summaryrefslogtreecommitdiffstats
path: root/drivers
AgeCommit message (Collapse)AuthorFilesLines
2009-06-12lguest: improve interrupt handling, speed up stream networkingRusty Russell4-8/+23
lguest never checked for pending interrupts when enabling interrupts, and things still worked. However, it makes a significant difference to TCP performance, so it's time we fixed it by introducing a pending_irq flag and checking it on irq_restore and irq_enable. These two routines are now too big to patch into the 8/10 bytes patch space, so we drop that code. Note: The high latency on interrupt delivery had a very curious effect: once everything else was optimized, networking without GSO was faster than networking with GSO, since more interrupts were sent and hence a greater chance of one getting through to the Guest! Note2: (Almost) Closing the same loophole for iret doesn't have any measurable effect, so I'm leaving that patch for the moment. Before: 1GB tcpblast Guest->Host: 30.7 seconds 1GB tcpblast Guest->Host (no GSO): 76.0 seconds After: 1GB tcpblast Guest->Host: 6.8 seconds 1GB tcpblast Guest->Host (no GSO): 27.8 seconds Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-06-12lguest: fix race in halt codeRusty Russell3-12/+31
When the Guest does the LHCALL_HALT hypercall, we go to sleep, expecting that a timer or the Waker will wake_up_process() us. But we do it in a stupid way, leaving a classic missing wakeup race. So split maybe_do_interrupt() into interrupt_pending() and try_deliver_interrupt(), and check maybe_do_interrupt() and the "break_out" flag before calling schedule. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-06-12lguest: fix lguest wake on guest clock tick, or fd activityRusty Russell2-5/+5
The Launcher could be inside the Guest on another CPU; wake_up_process will do nothing because it is "running". kick_process will knock it back into our kernel in this case, otherwise we'll miss it until the next guest exit. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-06-11Push BKL down into ->remount_fs()Alessio Igor Bogani1-0/+5
[xfs, btrfs, capifs, shmem don't need BKL, exempt] Signed-off-by: Alessio Igor Bogani <abogani@texware.it> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11fs: Remove i_cindex from struct inodeTheodore Ts'o2-3/+8
The only user of the i_cindex element in the inode structure is used is by the firewire drivers. As part of an attempt to slim down the inode structure to save memory --- since a typical Linux system will have hundreds of thousands if not millions of inodes cached, a reduction in the size inode has high leverage. The firewire driver does not need i_cindex in any fast path, so it's simple enough to calculate when it is needed, instead of wasting space in the inode structure. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: krh@redhat.com Cc: stefanr@s5r6.in-berlin.de Cc: linux-fsdevel@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-06-11Merge branch 'for-linus' of git://linux-arm.org/linux-2.6Linus Torvalds1-0/+1
* 'for-linus' of git://linux-arm.org/linux-2.6: kmemleak: Add the corresponding MAINTAINERS entry kmemleak: Simple testing module for kmemleak kmemleak: Enable the building of the memory leak detector kmemleak: Remove some of the kmemleak false positives kmemleak: Add modules support kmemleak: Add kmemleak_alloc callback from alloc_large_system_hash kmemleak: Add the vmalloc memory allocation/freeing hooks kmemleak: Add the slub memory allocation/freeing hooks kmemleak: Add the slob memory allocation/freeing hooks kmemleak: Add the slab memory allocation/freeing hooks kmemleak: Add documentation on the memory leak detector kmemleak: Add the base support Manual conflict resolution (with the slab/earlyboot changes) in: drivers/char/vt.c init/main.c mm/slab.c
2009-06-11Merge branch 'perfcounters-for-linus' of ↵Linus Torvalds1-0/+2
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (574 commits) perf_counter: Turn off by default perf_counter: Add counter->id to the throttle event perf_counter: Better align code perf_counter: Rename L2 to LL cache perf_counter: Standardize event names perf_counter: Rename enums perf_counter tools: Clean up u64 usage perf_counter: Rename perf_counter_limit sysctl perf_counter: More paranoia settings perf_counter: powerpc: Implement generalized cache events for POWER processors perf_counters: powerpc: Add support for POWER7 processors perf_counter: Accurate period data perf_counter: Introduce struct for sample data perf_counter tools: Normalize data using per sample period data perf_counter: Annotate exit ctx recursion perf_counter tools: Propagate signals properly perf_counter tools: Small frequency related fixes perf_counter: More aggressive frequency adjustment perf_counter/x86: Fix the model number of Intel Core2 processors perf_counter, x86: Correct some event and umask values for Intel processors ...
2009-06-11Merge branch 'topic/slab/earlyboot' of ↵Linus Torvalds2-9/+4
git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6 * 'topic/slab/earlyboot' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: vgacon: use slab allocator instead of the bootmem allocator irq: use kcalloc() instead of the bootmem allocator sched: use slab in cpupri_init() sched: use alloc_cpumask_var() instead of alloc_bootmem_cpumask_var() memcg: don't use bootmem allocator in setup code irq/cpumask: make memoryless node zero happy x86: remove some alloc_bootmem_cpumask_var calling vt: use kzalloc() instead of the bootmem allocator sched: use kzalloc() instead of the bootmem allocator init: introduce mm_init() vmalloc: use kzalloc() instead of alloc_bootmem() slab: setup allocators earlier in the boot sequence bootmem: fix slab fallback on numa bootmem: use slab if bootmem is no longer available
2009-06-11Merge branch 'upstream-linus' of ↵Linus Torvalds8-93/+181
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev: [libata] ata_piix: Enable parallel scan sata_nv: use hardreset only for post-boot probing [libata] ahci: Restore SB600 SATA controller 64 bit DMA ata_piix: Remove stale comment ata_piix: Turn on hotplugging support for older chips ahci: misc cleanups for EM stuff [libata] get rid of ATA_MAX_QUEUE loop in ata_qc_complete_multiple() v2 sata_sil: enable 32-bit PIO sata_sx4: speed up ECC initialization libata-sff: avoid byte swapping in ata_sff_data_xfer() [libata] ahci: use less error-prone array initializers
2009-06-11Merge branch 'for-2.6.31' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds92-1667/+1966
* 'for-2.6.31' of git://git.kernel.dk/linux-2.6-block: (153 commits) block: add request clone interface (v2) floppy: fix hibernation ramdisk: remove long-deprecated "ramdisk=" boot-time parameter fs/bio.c: add missing __user annotation block: prevent possible io_context->refcount overflow Add serial number support for virtio_blk, V4a block: Add missing bounce_pfn stacking and fix comments Revert "block: Fix bounce limit setting in DM" cciss: decode unit attention in SCSI error handling code cciss: Remove no longer needed sendcmd reject processing code cciss: change SCSI error handling routines to work with interrupts enabled. cciss: separate error processing and command retrying code in sendcmd_withirq_core() cciss: factor out fix target status processing code from sendcmd functions cciss: simplify interface of sendcmd() and sendcmd_withirq() cciss: factor out core of sendcmd_withirq() for use by SCSI error handling code cciss: Use schedule_timeout_uninterruptible in SCSI error handling code block: needs to set the residual length of a bidi request Revert "block: implement blkdev_readpages" block: Fix bounce limit setting in DM Removed reference to non-existing file Documentation/PCI/PCI-DMA-mapping.txt ... Manually fix conflicts with tracing updates in: block/blk-sysfs.c drivers/ide/ide-atapi.c drivers/ide/ide-cd.c drivers/ide/ide-floppy.c drivers/ide/ide-tape.c include/trace/events/block.h kernel/trace/blktrace.c
2009-06-11Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bpLinus Torvalds8-5/+4636
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: (26 commits) amd64_edac: add MAINTAINERS entry EDAC: do not enable modules by default amd64_edac: do not enable module by default amd64_edac: add module registration routines amd64_edac: add ECC reporting initializers amd64_edac: add EDAC core-related initializers amd64_edac: add error decoding logic amd64_edac: add ECC chipkill syndrome mapping table amd64_edac: add per-family descriptors amd64_edac: add F10h-and-later methods-p3 amd64_edac: add F10h-and-later methods-p2 amd64_edac: add F10h-and-later methods-p1 amd64_edac: add k8-specific methods amd64_edac: assign DRAM chip select base and mask in a family-specific way amd64_edac: add helper to dump relevant registers amd64_edac: add DRAM address type conversion facilities amd64_edac: add functionality to compute the DRAM hole amd64_edac: add sys addr to memory controller mapping helpers amd64_edac: add memory scrubber interface amd64_edac: add MCA error types ...
2009-06-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6Linus Torvalds10-205/+1180
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (266 commits) sh: Tie sparseirq in to Kconfig. sh: Wire up sys_rt_tgsigqueueinfo. sh: Fix sys_pwritev() syscall table entry for sh32. sh: Fix sh4a llsc-based cmpxchg() sh: sh7724: Add JPU support sh: sh7724: INTC setting update sh: sh7722 clock framework rewrite sh: sh7366 clock framework rewrite sh: sh7343 clock framework rewrite sh: sh7724 clock framework rewrite V3 sh: sh7723 clock framework rewrite V2 sh: add enable()/disable()/set_rate() to div6 code sh: add AP325RXA mode pin configuration sh: add Migo-R mode pin configuration sh: sh7722 mode pin definitions sh: sh7724 mode pin comments sh: sh7723 mode pin V2 sh: rework mode pin code sh: clock div6 helper code sh: clock div4 frequency table offset fix ...
2009-06-11Merge branch 'for-2.6.31' of ↵Linus Torvalds13-777/+350
git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6 * 'for-2.6.31' of git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (28 commits) ide-tape: fix debug call alim15x3: Remove historical hacks, re-enable init_hwif for PowerPC ide-dma: don't reset request fields on dma_timeout_retry() ide: drop rq->data handling from ide_map_sg() ide-atapi: kill unused fields and callbacks ide-tape: simplify read/write functions ide-tape: use byte size instead of sectors on rw issue functions ide-tape: unify r/w init paths ide-tape: kill idetape_bh ide-tape: use standard data transfer mechanism ide-tape: use single continuous buffer ide-atapi,tape,floppy: allow ->pc_callback() to change rq->data_len ide-tape,floppy: fix failed command completion after request sense ide-pm: don't abuse rq->data ide-cd,atapi: use bio for internal commands ide-atapi: convert ide-{floppy,tape} to using preallocated sense buffer ide-cd: convert to using generic sense request ide: add helpers for preparing sense requests ide-cd: don't abuse rq->buffer ide-atapi: don't abuse rq->buffer ...
2009-06-11vgacon: use slab allocator instead of the bootmem allocatorPekka Enberg1-3/+2
Slab is initialized before the console subsystem so use the slab allocator in vgacon_scrollback_startup(). Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-06-11vt: use kzalloc() instead of the bootmem allocatorPekka Enberg1-6/+2
Now that kmem_cache_init() happens before console_init(), we should use kzalloc() and not the bootmem allocator. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
2009-06-11kmemleak: Remove some of the kmemleak false positivesCatalin Marinas1-0/+7
There are allocations for which the main pointer cannot be found but they are not memory leaks. This patch fixes some of them. For more information on false positives, see Documentation/kmemleak.txt. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2009-06-11Merge branch 'serial-from-alan'Linus Torvalds80-2631/+4225
* serial-from-alan: (79 commits) moxa: prevent opening unavailable ports imx: serial: use tty_encode_baud_rate to set true rate imx: serial: add IrDA support to serial driver imx: serial: use rational library function lib: isolate rational fractions helper function imx: serial: handle initialisation failure correctly imx: serial: be sure to stop xmit upon shutdown imx: serial: notify higher layers in case xmit IRQ was not called imx: serial: fix one bit field type imx: serial: fix whitespaces (no changes in functionality) tty: use prepare/finish_wait tty: remove sleep_on sierra: driver interface blacklisting sierra: driver urb handling improvements tty: resolve some sierra breakage timbuart: Fix the termios logic serial: Added Timberdale UART driver tty: Add URL for ttydev queue devpts: unregister the file system on error tty: Untangle termios and mm mutex dependencies ...
2009-06-11Merge branch 'linus' into perfcounters/coreIngo Molnar43-214/+1324
Conflicts: arch/x86/kernel/irqinit.c arch/x86/kernel/irqinit_64.c arch/x86/kernel/traps.c arch/x86/mm/fault.c include/linux/sched.h kernel/exit.c
2009-06-11moxa: prevent opening unavailable portsDirk Eibach1-0/+5
In moxa.c there are 32 minor numbers reserved for each device. The number of ports actually available per device is stored in moxa_board_conf->numPorts. This number is not considered in moxa_open(). Opening a port that is not available results in a kernel oops. This patch adds a test to moxa_open() that prevents opening unavailable ports. Signed-off-by: Dirk Eibach <eibach@gdsys.de> Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: use tty_encode_baud_rate to set true rateOskar Schirmer1-0/+7
real baud rate may be different from the one requested. for upper layers, set the nearest value to the real rate in favour of the rate previously requested. Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: add IrDA support to serial driverFabian Godehardt1-19/+176
Using the iMX serial driver with an IrDA device needs extra peripheral settings and specific timing depending on the transmitter circuitry used. Signed-off-by: Fabian Godehardt <fg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: use rational library functionOskar Schirmer2-20/+11
for calculation of numerator and denominator used in baud rate setting, use generic library function for optimum settings. Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: handle initialisation failure correctlyDaniel Glöckner1-1/+6
correctly de-initialise device when setting up failed, call to pdata->exit() was missing. Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: be sure to stop xmit upon shutdownFabian Godehardt1-0/+4
needed to avoid continued transmission by hardware while software already shuts down, which might cause dangling characters to show up in hardware queues when restarting the device. Signed-off-by: Fabian Godehardt <fg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: notify higher layers in case xmit IRQ was not calledFabian Godehardt1-0/+3
upper layers, namely line discipline, need to be notified when transmission of more data is possible. For spurious cases, where IRQ handling does not supply notification for sure, it is given additionally here, when data has just been transmitted and space in the buffer will most probably be available. Signed-off-by: Fabian Godehardt <fg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: fix one bit field typeDaniel Glöckner1-1/+1
"have_rtscts" is assigned 1, while it is declared int:1, two's complement, which can hold 0 and -1 only. The code works, as the upper bits are cut off, and tests are done against 0 only. Nonetheless, correctly declaring the bit field as unsigned int:1 renders the code more robust. Signed-off-by: Daniel Glöckner <dg@emlix.com> Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11imx: serial: fix whitespaces (no changes in functionality)Oskar Schirmer1-25/+23
Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11tty: use prepare/finish_waitJiri Slaby1-4/+2
Use prepare_to_wait and finish_wait instead of add_wait_queue and remove_wait_queue. This avoids us setting a task state. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11tty: remove sleep_onJiri Slaby1-1/+2
Use wait_event instead of sleep_on in tty_block_til_ready. Wait for ASYNC_CLOSING flag being 0. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11sierra: driver interface blacklistingElina Pasheva1-3/+48
Interface blacklisting is necessary for non-serial interfaces that are handled by a different driver. The interface blacklisting is implemented in sierra driver per device. Each device in need of a blacklist has a static information array kept in the driver. This array contains the interface numbers that are blacklisted. The pointer for each blacklist array and the length of that blacklist are 'bundled' in data structure sierra_iface_info. A pointer to this information is set in id_table when the device is added to the id_table. The following is summary of changes we have made to sierra.c driver in this patch dealing with interface blacklisting support: - Added data structure sierra_iface_info and function is_blacklisted() to support blacklisting - Modified sierra_probe() to handle blacklisted interfaces accordingly - Improved comments in id_table - Added new device in id_table with blacklist interface support Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11sierra: driver urb handling improvementsElina Pasheva1-84/+144
[Folded from eight patches into one as the original set according to the author "All of the patches need to be applied to obtain a working product" so keeping them split seems unhelpful Merge fixes done versus other conflicting changes and moved the spin_lock_init from open to setup time -- Alan] Summary of the changes and code re-organization in this patch: - The memory for urbs is allocated and urbs are submitted only for the active interfaces (instead of pre-allocating these for all interfaces). This will save memory especially in the case of using composite devices. - The code has been re-organized and functionality has been extracted from sierra_startup(), sierra_shutdown(), sierra_open(), sierra_close() and added in helper functions sierra_release_urb(), sierra_stop_rx_urbs(), sierra_submit_rx_urbs() and sierra_setup_urb() - Added function sierra_release_urb() to free an urb and its transfer buffer. - Removed unecessary include file reference and comment. - Added function sierra_stop_rx_urbs() that takes care of the release of receive and interrupt urbs. This function is to be called by sierra_close() whenever an interface is de-activated. - Added new function sierra_submit_rx_urbs() that handles the submission of receive urbs and interrupt urbs (if any) during the interface activation. This function is to be called by sierra_open(). Added a second parameter to pass the memory allocation (as suggested by Oliver Neukum) so that this function can be used in post_reset() and resume(). - Added new function sierra_setup_urb() that contains the functionality to allocate an urb, fill bulk urb using the supplied memory allocation flag and release urb upon error. Added parameter so that the caller pass the memory allocation flag for flexibility. - Moved sierra_close() before sierra_open() to resolve dependencies introduced by the code reorganization. - Modified sierra_close() to call sierra_stop_rx_urbs() and sierra_release_urb() functions added in previous patch. - Modified sierra_open() to call sierra_setup_urb() and sierra_submit_rx_urbs() functions; note urbs are allocated and submitted for each activated interface. - Modified sierra_startup() so that allocation of urbs happens whenever an interface is activated (urb allocation is moved to sierra_open()). - Modified sierra_shutdown() so that urbs are freed whenever an interface is de-activated (urb freeing moved to sierra_close() as shown in previous patch from the series) - Removed unecessary data structure from sierra_port_private_data - Suppress an entry in logs by not re-submitting an urb when usb_submit_urb() returns -EPERM, as this shows that usb_kill_urb() is running (as suggested by Oliver Neukum) Signed-off-by: Elina Pasheva <epasheva@sierrawireless.com> Signed-off-by: Alan Cox <alan.cox@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11tty: resolve some sierra breakageAlan Cox1-3/+14
The various merges into the sierra driver inadvertently undid commit 212b8f0c3f5a2280bfa1d6ab13a6fe98552becaa by Elina Pasheva <epasheva@sierrawireless.com>. Put it back so the OBEX port works again. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11timbuart: Fix the termios logicAlan Cox1-9/+15
The driver only handles speeds but it fails to return the current values for the hardware features it does not support. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11serial: Added Timberdale UART driverRichard Röjfors4-0/+586
Driver for the UART found in the Timberdale FPGA Signed-off-by: Richard Röjfors <richard.rojfors.ext@mocean-labs.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11tty: Untangle termios and mm mutex dependenciesAlan Cox1-29/+46
Although this doesn't cause any problems it could potentially do so for future mmap using devices. No real work is needed to sort it out so untangle it before it causes problems Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11tty: bfin_jtag_comm: emulate a TTY over the Blackfin EMUDAT/JTAG interfaceMike Frysinger3-0/+379
The Blackfin JTAG interface has a 4 byte generic data field (EMUDAT). With a little creative thinking, we can turn this into a TTY device. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11ftdi_sio: don't override modem bitsAlan Cox1-5/+0
The new open/close logic handles DTR and friends, so don't do it in our own open routine as well. Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11tty: fix bluetooth scribbling on low latency flagsAlan Cox1-1/+0
Bluetooth shouldn't be doing this as most drivers don't support the flag, furthermore it shouldn't be needed with newer buffering. This becomes rather more visible as the locking fixes make the abuse of low_latency visible as spew on the users console/dmesg. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11ft232: support the ASYNC_LOW_LATENCY flagAlan Cox1-34/+60
This allows users to use the standard setserial command with this FT232 feature as well as obscure chip specific interfaces we have now. We keep track of and respect the sysfs value for non-low-latency cases. In theory we could do smart stuff with VTIME and the like but this seems of questionable worth. Closes-bug: http://bugzilla.kernel.org/show_bug.cgi?id=9120 Signed-off-by: Alan Cox <alan@linux.intel.com) Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11USB: CP210X Replace CP2101 with CP210xCraig Shelley1-97/+97
This patch replaces the string "CP2101" with "CP210x" within cp210x.c This is to reduce confusion about the fact that the driver is actually compatible with CP2101, CP2102 and CP2103 devices. Signed-off-by: Craig Shelley <craig@microtron.org.uk> (Fixed some collisions merging) Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11USB: CP210X Use official request code definitionsCraig Shelley1-42/+56
The CP210X driver was developed without official device specifications. This has lead to an incorrect assumption that all GET request codes are equal to the corresponding SET request code +1. This patch removes this incorrect assumption, and uses request code definitions based on the updated GPL driver from SiLabs. This modification is needed before extended functionality such as GPIO on CP2103 can be supported. Signed-off-by: Craig Shelley <craig@microtron.org.uk> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11USB: CP210X Add device IDsCraig Shelley1-0/+7
Signed-off-by: Craig Shelley <craig@microtron.org.uk> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11Blackfin Serial Driver: disable dma rx interrupt only rather than all irqsSonic Zhang1-3/+4
The UART RX handling code isn't exactly speeding, so don't go disabling all interrupts when processing the buffer. Just disable the relevant DMA interrupt. This greatly improves latency of the system when utilizing the UART. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11Blackfin Serial Driver: handle anomaly 05000231Sonic Zhang1-2/+10
05000231 - UART STB Bit Incorrectly Affects Receiver Setting For processors affected by this, we cannot safely allow CSTOPB to be set as the UART will then be unable to properly clock in bytes. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11Blackfin Serial Driver: annotate anomalies 05000215 and 05000099Sonic Zhang1-0/+14
Add some comments for how these anomalies are addressed: 05000215 - UART TX Interrupt Masked Erroneously We always clear ETBEI within last UART TX interrupt to end a string. It is always set when starting a new tx transfer. 05000099 - UART Line Status Register (UART_LSR) Bits Are Not Updated at the Same Time This anomaly affects driver only in POLL code where multi bits of UART_LSR are checked. It doesn't affect current bfin_5xx.c driver. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11Blackfin Serial Driver: handle irregular DMA register status in auto start modeSonic Zhang1-3/+4
This bug is caused by irregular behavior of DMA register CURR_X_COUNT and CURR_Y_COUNT when an auto restart uart rx DMA run to last byte in DMA buffer, trigger the interrupt and stay at this possiton. The status of current x and y is 0:7 instead of 512:8 or 0:8. The driver doesn't take care of this case when calculating the position. URL: http://blackfin.uclinux.org/gf/tracker/5063 Reported-by: Tomasz Motylewski <t.motylewski@bfad.de> Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11Blackfin Serial Driver: fix missing new lines when under loadGraf Yang1-0/+1
Add a SSYNC() into bfin_serial_dma_tx_chars() to ensure DMA registers are written with new data otherwise we might miss a byte or two when the system is under load. PIO mode is OK though. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11Blackfin Serial Driver: fix baudrate for early_printkRobin Getz1-1/+6
Since we already setup the early console UART in arch/blackfin/kernel/early_printk.c, and common functions which are enabled from the .setup will override the proper settings later, don't fill in these structures. Otherwise we get mangled baudrate settings when using early_printk. Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11Blackfin Serial Driver: fix error while transferring large filesSonic Zhang1-2/+29
Ignore receiving data if new position is in the same line of current buffer tail and is small. This should decrease overruns. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11Blackfin SPORT UART: rewrite inline assemblyMike Frysinger1-25/+29
Hopefuly the new version is easier to read, but in the process it declares proper clobber lists and better constraints so that GCC can do a better job at allocating free registers. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bryan Wu <cooloney@kernel.org> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 19:53:00 +0000