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2016-02-06ARM: OMAP: serial: Rename DRIVER_NAMEJean Delvare1-1/+1
DRIVER_NAME is too generic to be used in a driver-specific platform data file. Use a name specific to the driver instead, to avoid collisions. Signed-off-by: Jean Delvare <jdelvare@suse.de> Acked-by: Tony Lindgren <tony@atomide.com> Cc: Jiri Slaby <jslaby@suse.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-06tty: Add software emulated RS485 support for 8250Matwey V. Kornilov1-0/+8
Implementation of software emulation of RS485 direction handling is based on omap_serial driver. Before and after transmission RTS is set to the appropriate value. Note that before calling serial8250_em485_init() the caller has to ensure that UART will interrupt when shift register empty. Otherwise, emultaion cannot be used. Both serial8250_em485_init() and serial8250_em485_destroy() are idempotent functions. Signed-off-by: Matwey V. Kornilov <matwey@sai.msu.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-06of: earlycon: Move address translation to of_setup_earlycon()Peter Hurley2-2/+2
Cleanup the early DT/earlycon separation; remove the 'addr' parameter from of_setup_earlycon() and get the uart phys addr directly with a new wrapper function, of_flat_dt_translate_addr(). Limit fdt_translate_address() to file scope. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-06of: earlycon: Initialize port fields from DT propertiesPeter Hurley1-0/+1
Read the optional "reg-offset", "reg-shift", "reg-io-width" and endianness properties and initialize the respective struct uart_port field if found. NB: These bindings are common to several drivers and the values merely indicate the default value; the registering earlycon setup() method can simply override the values if required. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-06of: earlycon: Add options string handlingPeter Hurley1-1/+2
Pass-through any options string in the 'stdout-path' property to the earlycon "driver" setup. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-06of: earlycon: Fixup earlycon console name and indexPeter Hurley1-2/+1
Use the console name embedded in the OF earlycon table by the OF_EARLYCON_DECLARE() macro to initialize the struct console 'name' and 'index' fields. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-06earlycon: Use common framework for earlycon declarationsPeter Hurley2-13/+15
Use a single common table of struct earlycon_id for both command line and devicetree. Re-define OF_EARLYCON_DECLARE() macro to instance a unique earlycon declaration (the declaration is only guaranteed to be unique within a compilation unit; separate compilation units must still use unique earlycon names). The semantics of OF_EARLYCON_DECLARE() is different; it declares an earlycon which can matched either on the command line or by devicetree. EARLYCON_DECLARE() is semantically unchanged; it declares an earlycon which is matched by command line only. Remove redundant instances of EARLYCON_DECLARE(). This enables all earlycons to properly initialize struct console with the appropriate name and index, which improves diagnostics and enables direct earlycon-to-console handoff. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-02-01Merge 4.5-rc2 into tty-nextGreg Kroah-Hartman10-24/+65
We want the tty/serial fixes in here as well to make merges easier. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-31Merge tag 'tty-4.5-rc2' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial fixes from Greg KH: "Here are some small tty/serial driver fixes for 4.5-rc2. They resolve a number of reported problems (the ioctl one specifically has been pointed out by numerous people) and one patch adds some new device ids for the 8250_pci driver. All have been in linux-next successfully" * tag 'tty-4.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: serial: 8250_pci: Add Intel Broadwell ports staging/speakup: Use tty_ldisc_ref() for paste kworker n_tty: Fix unsafe reference to "other" ldisc tty: Fix unsafe ldisc reference via ioctl(TIOCGETD) tty: Retry failed reopen if tty teardown in-progress tty: Wait interruptibly for tty lock on reopen
2016-01-31Merge branch 'timers-urgent-for-linus' of ↵Linus Torvalds1-3/+31
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull timer fixes from Thomas Gleixner: "The timer departement delivers: - a regression fix for the NTP code along with a proper selftest - prevent a spurious timer interrupt in the NOHZ lowres code - a fix for user space interfaces returning the remaining time on architectures with CONFIG_TIME_LOW_RES=y - a few patches to fix COMPILE_TEST fallout" * 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tick/nohz: Set the correct expiry when switching to nohz/lowres mode clocksource: Fix dependencies for archs w/o HAS_IOMEM clocksource: Select CLKSRC_MMIO where needed tick/sched: Hide unused oneshot timer code kselftests: timers: Add adjtimex SETOFFSET validity tests ntp: Fix ADJ_SETOFFSET being used w/ ADJ_NANO itimers: Handle relative timers with CONFIG_TIME_LOW_RES proper posix-timers: Handle relative timers with CONFIG_TIME_LOW_RES proper timerfd: Handle relative timers with CONFIG_TIME_LOW_RES proper hrtimer: Handle remaining time proper for TIME_LOW_RES clockevents/tcb_clksrc: Prevent disabling an already disabled clock
2016-01-31Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds1-6/+3
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Thomas Gleixner: "This is much bigger than typical fixes, but Peter found a category of races that spurred more fixes and more debugging enhancements. Work started before the merge window, but got finished only now. Aside of that this contains the usual small fixes to perf and tools. Nothing particular exciting" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (43 commits) perf: Remove/simplify lockdep annotation perf: Synchronously clean up child events perf: Untangle 'owner' confusion perf: Add flags argument to perf_remove_from_context() perf: Clean up sync_child_event() perf: Robustify event->owner usage and SMP ordering perf: Fix STATE_EXIT usage perf: Update locking order perf: Remove __free_event() perf/bpf: Convert perf_event_array to use struct file perf: Fix NULL deref perf/x86: De-obfuscate code perf/x86: Fix uninitialized value usage perf: Fix race in perf_event_exit_task_context() perf: Fix orphan hole perf stat: Do not clean event's private stats perf hists: Fix HISTC_MEM_DCACHELINE width setting perf annotate browser: Fix behaviour of Shift-Tab with nothing focussed perf tests: Remove wrong semicolon in while loop in CQM test perf: Synchronously free aux pages in case of allocation failure ...
2016-01-31Merge branch 'irq-urgent-for-linus' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull IRQ fixes from Ingo Molnar: "Mostly irqchip driver fixes, but also an irq core crash fix and a build fix" * 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/mxs: Add missing set_handle_irq() irqchip/atmel-aic: Fix wrong bit operation for IRQ priority irqchip/gic-v3-its: Recompute the number of pages on page size change base: Export platform_msi_domain_[alloc,free]_irqs of: MSI: Simplify irqdomain lookup irqdomain: Allow domain lookup with DOMAIN_BUS_WIRED token irqchip: Fix dependencies for archs w/o HAS_IOMEM irqchip/s3c24xx: Mark init_eint as __maybe_unused genirq: Validate action before dereferencing it in handle_irq_event_percpu()
2016-01-29Merge branch 'stable/for-linus-4.5' of ↵Linus Torvalds1-0/+3
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb Pull swiotlb patchlet from Konrad Rzeszutek Wilk: "One trivial patch. Another patch (from Fengguang) is already in your tree courtesy of Andrew Morton - but I would prefer not to rebase my tree. Hence the diff is very small" * 'stable/for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb: swiotlb: Make linux/swiotlb.h standalone includible MAINTAINERS: add git URL for swiotlb
2016-01-29Merge branch 'stable/for-linus-4.5' of ↵Linus Torvalds1-9/+7
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm Pull cleancache cleanups from Konrad Rzeszutek Wilk: "Simple cleanups" * 'stable/for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm: include/linux/cleancache.h: Clean up code cleancache: constify cleancache_ops structure
2016-01-29Merge tag 'iommu-fixes-v4.5-rc1' of ↵Linus Torvalds1-4/+12
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu Pull IOMMU fixes from Joerg Roedel: "Five patches queued up: - Two patches for the AMD and Intel IOMMU drivers to fix alias handling and ATS handling. - Fix build error with arm io-pgtable code - Two documentation fixes" * tag 'iommu-fixes-v4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: iommu: Update struct iommu_ops comments iommu/vt-d: Fix link to Intel IOMMU Specification iommu/amd: Correct the wrong setting of alias DTE in do_attach iommu/vt-d: Don't skip PCI devices when disabling IOTLB iommu/io-pgtable-arm: Fix io-pgtable-arm build failure
2016-01-29Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds2-0/+7
Pull drm fixes from Dave Airlie: "Summary: - Misc amdgpu/radeon fixes - VC4 build fix - vmwgfx fix - misc rockchip fixes The etnaviv guys had an API feature they wanted in their first release, so I've merged that with their fixes" * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (41 commits) drm/vmwgfx: respect 'nomodeset' drm/amdgpu: only move pt bos in LRU list on success drm/radeon: fix DP audio support for APU with DCE4.1 display engine drm/radeon: Add a common function for DFS handling drm/radeon: cleaned up VCO output settings for DP audio drm/amd/powerplay: Update SMU firmware loading for Stoney drm/etnaviv: call correct function when trying to vmap a DMABUF drm/etnaviv: rename etnaviv_gem_vaddr to etnaviv_gem_vmap drm/etnaviv: fix get pages error path in etnaviv_gem_vaddr drm/etnaviv: fix memory leak in IOMMU init path drm/etnaviv: add further minor features and varyings count drm/etnaviv: add helper for comparing model/revision IDs drm/etnaviv: add helper to extract bitfields drm/etnaviv: use defined constants for the chip model drm/etnaviv: update common and state_hi xml.h files drm/etnaviv: ignore VG GPUs with FE2.0 drm/amdgpu: don't init fbdev if we don't have any connectors drm/radeon: only init fbdev if we have connectors drm/radeon: Ensure radeon bo is unreserved in radeon_gem_va_ioctl drm/etnaviv: fix failure path if model is zero ...
2016-01-29iommu: Update struct iommu_ops commentsMagnus Damm1-4/+12
Update the comments around struct iommu_ops to match current state and fix a few typos while at it. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Signed-off-by: Joerg Roedel <jroedel@suse.de>
2016-01-29perf: Synchronously clean up child eventsPeter Zijlstra1-3/+0
The orphan cleanup workqueue doesn't always catch orphans, for example, if they never schedule after they are orphaned. IOW, the event leak is still very real. It also wouldn't work for kernel counters. Doing it synchonously is a little hairy due to lock inversion issues, but is made to work. Patch based on work by Alexander Shishkin. Suggested-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: vince@deater.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-29perf/bpf: Convert perf_event_array to use struct fileAlexei Starovoitov1-2/+2
Robustify refcounting. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Arnaldo Carvalho de Melo <acme@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Wang Nan <wangnan0@huawei.com> Cc: vince@deater.net Link: http://lkml.kernel.org/r/20160126045947.GA40151@ast-mbp.thefacebook.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-28Merge tag 'trace-v4.5-rc1' of ↵Linus Torvalds2-2/+1
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull minor tracing fixes from Steven Rostedt: "This includes three minor fixes, mostly due to cut-and-paste issues. The first is a cut and paste issue that changed the amount of stack to skip when tracing a stack dump from 0 to 6, which basically made the stack disappear for small stack traces. The second fix is just removing an unused field in a struct that is no longer used, and currently just wastes space. The third is another cut-and-paste fix that had a tracepoint recording the wrong field (it was recording the previous field a second time)" * tag 'trace-v4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: tracing/dma-buf/fence: Fix timeline str value on fence_annotate_wait_on ftrace: Remove unused nr_trampolines var tracing: Fix stacktrace skip depth in trace_buffer_unlock_commit_regs()
2016-01-29Merge branch 'drm-rockchip-next-fixes-2016-01-22' of ↵Dave Airlie1-0/+4
https://github.com/markyzq/kernel-drm-rockchip into drm-fixes Here are some fixes for drm/rockchip, these fixes base on drm-next. These fixes works on my popmetal(rk3288) board. About patch: drm/atomic-helper: Export framebuffer_changed() Daniel Vetter ack for merging it through rockchip git trees, so framebuffer_changed() can be reused by drm/rockchip. All others looks good, so I'd like you can land them. * 'drm-rockchip-next-fixes-2016-01-22' of https://github.com/markyzq/kernel-drm-rockchip: drm/rockchip: respect CONFIG_DRM_FBDEV_EMULATION drm/rockchip: fix wrong pitch/size using on gem drm/rockchip: explain why we can't wait_for_vblanks drm/rockchip: don't wait for vblank if fb hasn't changed drm/atomic-helper: Export framebuffer_changed() drm/rockchip/dsi: fix handling mipi_dsi_pixel_format_to_bpp result drm/rockchip: vop: fix mask when updating interrupts drm/rockchip: cleanup unnecessary export symbol drm/rockchip: Don't build rockchip_drm_vop as modules
2016-01-28isdn: Remove ASYNC_CLOSINGPeter Hurley1-0/+1
The tty core no longer provides ASYNC_CLOSING. Use private flag for same purpose, which is to disable AT-emulator output (why this is necessary is not clear). Cc: Karsten Keil <isdn@linux-pingi.de> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28tty: Unify receive_buf() code pathsPeter Hurley1-14/+2
Instead of two distinct code branches for receive_buf() handling, use tty_ldisc_receive_buf() as the single code path. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28tty: Fix GPF in flush_to_ldisc(), part 2Peter Hurley1-1/+1
commit 9ce119f318ba ("tty: Fix GPF in flush_to_ldisc()") fixed a GPF caused by a line discipline which does not define a receive_buf() method. However, the vt driver (and speakup driver also) pushes selection data directly to the line discipline receive_buf() method via tty_ldisc_receive_buf(). Fix the same problem in tty_ldisc_receive_buf(). Cc: <stable@vger.kernel.org> Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-28tty, n_tty: Remove fasync() ldisc notificationPeter Hurley1-6/+0
Only the N_TTY line discipline implements the signal-driven i/o notification enabled/disabled by fcntl(F_SETFL, O_ASYNC). The ldisc fasync() notification is sent to the ldisc when the enable state has changed (the tty core is notified via the fasync() VFS file operation). The N_TTY line discipline used the enable state to change the wakeup condition (minimum_to_wake = 1) for notifying the signal handler i/o is available. However, just the presence of data is sufficient and necessary to signal i/o is available, so changing minimum_to_wake is unnecessary (and creates a race condition with read() and poll() which may be concurrently updating minimum_to_wake). Furthermore, since the kill_fasync() VFS helper performs no action if the fasync list is empty, calling unconditionally is preferred; if signal driven i/o just has been disabled, no signal will be sent by kill_fasync() anyway so notification of the change via the ldisc fasync() method is superfluous. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: audit: Handle tty audit enable atomicallyPeter Hurley2-1/+4
The audit_tty and audit_tty_log_passwd fields are actually bool values, so merge into single memory location to access atomically. NB: audit log operations may still occur after tty audit is disabled which is consistent with the existing functionality Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: audit: Combine push functionsPeter Hurley1-6/+2
tty_audit_push() and tty_audit_push_current() perform identical tasks; eliminate the tty_audit_push() implementation and the tty_audit_push_current() name. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: audit: Ignore current association for audit pushPeter Hurley1-2/+2
In canonical read mode, each line read and logged is pushed separately with tty_audit_push(). For all single-threaded processes and multi-threaded processes reading from only one tty, this patch has no effect; the last line read will still be the entry pushed to the audit log because the tty association cannot have changed between tty_audit_add_data() and tty_audit_push(). For multi-threaded processes reading from different ttys concurrently, the audit log will have mixed log entries anyway. Consider two ttys audited concurrently: CPU0 CPU1 ---------- ------------ tty_audit_add_data(ttyA) tty_audit_add_data(ttyB) tty_audit_push() tty_audit_add_data(ttyB) tty_audit_push() This patch will now cause the ttyB output to be split into separate audit log entries. However, this possibility is equally likely without this patch: CPU0 CPU1 ---------- ------------ tty_audit_add_data(ttyB) tty_audit_add_data(ttyA) tty_audit_push() tty_audit_add_data(ttyB) tty_audit_push() Mixed canonical and non-canonical reads have similar races. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: audit: Remove icanon mode from call chainPeter Hurley1-2/+2
The tty termios bits cannot change while n_tty_read() is in the i/o loop; the termios_rwsem ensures mutual exclusion with termios changes in n_tty_set_termios(). Check L_ICANON() directly and eliminate icanon parameter. NB: tty_audit_add_data() => tty_audit_buf_get() => tty_audit_buf_alloc() is a single path; ie., tty_audit_buf_get() and tty_audit_buf_alloc() have no other callers. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Make tty_files_lock per-ttyPeter Hurley1-1/+1
Access to tty->tty_files list is always per-tty, never for all ttys simultaneously. Replace global tty_files_lock spinlock with per-tty ->files_lock. Initialize when the ->tty_files list is inited, in alloc_tty_struct(). Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Remove unreferenced tty flags macro TTY_DEBUGPeter Hurley1-1/+0
The TTY_DEBUG macro is not used; remove. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Move tty_check_change() helperPeter Hurley1-1/+0
Move is_ignored() to drivers/tty/tty_io.c and re-declare in file scope. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Remove declarations to non-existent functionsPeter Hurley1-3/+0
tty_read_raw_data() and tty_signal() no longer exist; remove declarations. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Eliminate global symbol tty_ldisc_N_TTYPeter Hurley1-2/+1
Reduce global tty symbols; move and rename tty_ldisc_begin() as n_tty_init() and redefine the N_TTY ldisc ops as file scope. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Destroy ldisc instance on hangupPeter Hurley1-1/+2
Currently, when the tty is hungup, the ldisc is re-instanced; ie., the current instance is destroyed and a new instance is created. The purpose of this design was to guarantee a valid, open ldisc for the lifetime of the tty. However, now that tty buffers are owned by and have lifetime equivalent to the tty_port (since v3.10), any data received immediately after the ldisc is re-instanced may cause continued driver i/o operations concurrently with the driver's hangup() operation. For drivers that shutdown h/w on hangup, this is unexpected and usually bad. For example, the serial core may free the xmit buffer page concurrently with an in-progress write() operation (triggered by echo). With the existing stable and robust ldisc reference handling, the cleaned-up tty_reopen(), the straggling unsafe ldisc use cleaned up, and the preparation to properly handle a NULL tty->ldisc, the ldisc instance can be destroyed and only re-instanced when the tty is re-opened. If the tty was opened as /dev/console or /dev/tty0, the original behavior of re-instancing the ldisc is retained (the 'reinit' parameter to tty_ldisc_hangup() is true). This is required since those file descriptors are never hungup. This patch has neglible impact on userspace; the tty file_operations ptr is changed to point to the hungup file operations _before_ the ldisc instance is destroyed, so only racing file operations might now retrieve a NULL ldisc reference (which is simply handled as if the hungup file operation had been called instead -- see "tty: Prepare for destroying line discipline on hangup"). This resolves a long-standing FIXME and several crash reports. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Use 'disc' for line discipline index namePeter Hurley1-1/+1
tty->ldisc is a ptr to struct tty_ldisc, but unfortunately 'ldisc' is also used as a parameter or local name to refer to the line discipline index value (ie, N_TTY, N_GSM, etc.); instead prefer the name used by the line discipline registration/ref counting functions. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Remove chars_in_buffer() line discipline methodPeter Hurley1-7/+0
The chars_in_buffer() line discipline method serves no functional purpose, other than as a (dubious) debugging aid for mostly bit-rotting drivers. Despite being documented as an optional method, every caller is unconditionally executed (although conditionally compiled). Furthermore, direct tty->ldisc access without an ldisc ref is unsafe. Lastly, N_TTY's chars_in_buffer() has warned of removal since 3.12. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Remove __lockfunc annotation from tty lock functionsPeter Hurley1-4/+4
The tty lock/unlock code does not belong in the special lockfunc section which is treated specially by stack backtraces. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Re-declare tty_driver_remove_tty() file scopePeter Hurley1-2/+0
tty_driver_remove_tty() is only local-scope; declare as static. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Fix tty_init_termios() declarationPeter Hurley1-3/+1
tty_init_termios() never returns an error; re-declare as void. Remove unnecessary error handling from callers. Remove extern declarations of tty_free_termios() and free_tty_struct() and re-declare in file scope. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27tty: Fix ldisc leak in failed tty_init_dev()Peter Hurley1-1/+0
release_tty() leaks the ldisc instance when called directly (rather than when releasing the file descriptor from tty_release()). Since tty_ldisc_release() clears tty->ldisc, releasing the ldisc instance at tty teardown if tty->ldisc is non-null is not in danger of double-releasing the ldisc. Remove deinitialize_tty_struct() now that free_tty_struct() always performs the tty_ldisc_deinit(). Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-27include/linux/cleancache.h: Clean up codeChen Gang1-8/+6
Let cleancache_fs_enabled() call cleancache_fs_enabled_mapping() directly. Remove redundant variable ret in cleancache_get_page(). Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2016-01-27cleancache: constify cleancache_ops structureJulia Lawall1-1/+1
The cleancache_ops structure is never modified, so declare it as const. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2016-01-26tty: Wait interruptibly for tty lock on reopenPeter Hurley1-0/+1
Allow a signal to interrupt the wait for a tty reopen; eg., if the tty has starting final close and is waiting for the device to drain. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Cc: stable <stable@vger.kernel.org> # 4.4 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-01-26drm/etnaviv: add further minor features and varyings countRussell King1-0/+3
Export further minor feature bitmasks and the varyings count from the GPU specifications registers to userspace. Acked-by: Christian Gmeiner <christian.gmeiner@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2016-01-26irqdomain: Allow domain lookup with DOMAIN_BUS_WIRED tokenMarc Zyngier1-0/+1
Let's take the (outlandish) example of an interrupt controller capable of handling both wired interrupts and PCI MSIs. With the current code, the PCI MSI domain is going to be tagged with DOMAIN_BUS_PCI_MSI, and the wired domain with DOMAIN_BUS_ANY. Things get hairy when we start looking up the domain for a wired interrupt (typically when creating it based on some firmware information - DT or ACPI). In irq_create_fwspec_mapping(), we perform the lookup using DOMAIN_BUS_ANY, which is actually used as a wildcard. This gives us one chance out of two to end up with the wrong domain, and we try to configure a wired interrupt with the MSI domain. Everything grinds to a halt pretty quickly. What we really need to do is to start looking for a domain that would uniquely identify a wired interrupt domain, and only use DOMAIN_BUS_ANY as a fallback. In order to solve this, let's introduce a new DOMAIN_BUS_WIRED token, which is going to be used exactly as described above. Of course, this depends on the irqchip to setup the domain bus_token, and nobody had to implement this so far. Only so far. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Link: http://lkml.kernel.org/r/1453816347-32720-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-01-25tracing/dma-buf/fence: Fix timeline str value on fence_annotate_wait_onGustavo Padovan1-1/+1
timeline was wrongly assigned with ->get_driver_name(). Link: http://lkml.kernel.org/r/1453376895-30747-1-git-send-email-gustavo@padovan.org Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-01-24Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds3-0/+236
Pull MIPS updates from Ralf Baechle: "This is the main pull request for MIPS for 4.5 plus some 4.4 fixes. The executive summary: - ATH79 platform improvments, use DT bindings for the ATH79 USB PHY. - Avoid useless rebuilds for zboot. - jz4780: Add NEMC, BCH and NAND device tree nodes - Initial support for the MicroChip's DT platform. As all the device drivers are missing this is still of limited use. - Some Loongson3 cleanups. - The unavoidable whitespace polishing. - Reduce clock skew when synchronizing the CPU cycle counters on CPU startup. - Add MIPS R6 fixes. - Lots of cleanups across arch/mips as fallout from KVM. - Lots of minor fixes and changes for IEEE 754-2008 support to the FPU emulator / fp-assist software. - Minor Ralink, BCM47xx and bcm963xx platform support improvments. - Support SMP on BCM63168" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (84 commits) MIPS: zboot: Add support for serial debug using the PROM MIPS: zboot: Avoid useless rebuilds MIPS: BMIPS: Enable ARCH_WANT_OPTIONAL_GPIOLIB MIPS: bcm63xx: nvram: Remove unused bcm63xx_nvram_get_psi_size() function MIPS: bcm963xx: Update bcm_tag field image_sequence MIPS: bcm963xx: Move extended flash address to bcm_tag header file MIPS: bcm963xx: Move Broadcom BCM963xx image tag data structure MIPS: bcm63xx: nvram: Use nvram structure definition from header file MIPS: bcm963xx: Add Broadcom BCM963xx board nvram data structure MAINTAINERS: Add KVM for MIPS entry MIPS: KVM: Add missing newline to kvm_err() MIPS: Move KVM specific opcodes into asm/inst.h MIPS: KVM: Use cacheops.h definitions MIPS: Break down cacheops.h definitions MIPS: Use EXCCODE_ constants with set_except_vector() MIPS: Update trap codes MIPS: Move Cause.ExcCode trap codes to mipsregs.h MIPS: KVM: Make kvm_mips_{init,exit}() static MIPS: KVM: Refactor added offsetof()s MIPS: KVM: Convert EXPORT_SYMBOL to _GPL ...
2016-01-24Merge branch 'next' of ↵Linus Torvalds1-0/+5
git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux Pull thermal management updates from Zhang Rui: "The top merge commit was re-generated yesterday because two topic branches were dropped from this pull request in the last minute due to some unaddressed comments. All the other material has been in linux-next for quite a while. Specifics: - Enhance thermal core to handle unexpected device cooling states after fresh boot and system resume. From Zhang Rui and Chen Yu. - Several fixes and cleanups on Rockchip and RCAR thermal drivers. From Caesar Wang and Kuninori Morimoto. - Add Broxton support for Intel processor thermal reporting device driver. From Amy Wiles" * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: thermal: trip_point_temp_store() calls thermal_zone_device_update() thermal: rcar: rcar_thermal_get_temp() return error if strange temp thermal: rcar: check irq possibility in rcar_thermal_irq_xxx() thermal: rcar: check every rcar_thermal_update_temp() return value thermal: rcar: move rcar_thermal_dt_ids to upside thermal: rockchip: Support the RK3399 SoCs in thermal driver thermal: rockchip: Support the RK3228 SoCs in thermal driver dt-bindings: rockchip-thermal: Support the RK3228/RK3399 SoCs compatible thermal: rockchip: fix a trivial typo Thermal: Enable Broxton SoC thermal reporting device thermal: constify pch_dev_ops structure Thermal: do thermal zone update after a cooling device registered Thermal: handle thermal zone device properly during system sleep Thermal: initialize thermal zone device correctly
2016-01-24Merge branch 'for-linus' of ↵Linus Torvalds2-37/+2
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph updates from Sage Weil: "The two main changes are aio support in CephFS, and a series that fixes several issues in the authentication key timeout/renewal code. On top of that are a variety of cleanups and minor bug fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: libceph: remove outdated comment libceph: kill off ceph_x_ticket_handler::validity libceph: invalidate AUTH in addition to a service ticket libceph: fix authorizer invalidation, take 2 libceph: clear messenger auth_retry flag if we fault libceph: fix ceph_msg_revoke() libceph: use list_for_each_entry_safe ceph: use i_size_{read,write} to get/set i_size ceph: re-send AIO write request when getting -EOLDSNAP error ceph: Asynchronous IO support ceph: Avoid to propagate the invalid page point ceph: fix double page_unlock() in page_mkwrite() rbd: delete an unnecessary check before rbd_dev_destroy() libceph: use list_next_entry instead of list_entry_next ceph: ceph_frag_contains_value can be boolean ceph: remove unused functions in ceph_frag.h
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-22 02:14:55 +0000