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2014-07-01UBI: fix the volumes tree sorting criteriaHeiko Schocher1-1/+1
Commig "604b592 UBI: fix rb_tree node comparison in add_map" broke fastmap backward compatibility and older fastmap images cannot be mounted anymore. The reason is that it changes the volumes RB-tree sorting criteria. This patch fixes the problem. Artem: re-write the commit message Signed-off-by: Heiko Schocher <hs@denx.de> Acked-by: Richard Weinberger <richard@nod.at> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-06-12Merge branch 'for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs updates from Al Viro: "This the bunch that sat in -next + lock_parent() fix. This is the minimal set; there's more pending stuff. In particular, I really hope to get acct.c fixes merged this cycle - we need that to deal sanely with delayed-mntput stuff. In the next pile, hopefully - that series is fairly short and localized (kernel/acct.c, fs/super.c and fs/namespace.c). In this pile: more iov_iter work. Most of prereqs for ->splice_write with sane locking order are there and Kent's dio rewrite would also fit nicely on top of this pile" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (70 commits) lock_parent: don't step on stale ->d_parent of all-but-freed one kill generic_file_splice_write() ceph: switch to iter_file_splice_write() shmem: switch to iter_file_splice_write() nfs: switch to iter_splice_write_file() fs/splice.c: remove unneeded exports ocfs2: switch to iter_file_splice_write() ->splice_write() via ->write_iter() bio_vec-backed iov_iter optimize copy_page_{to,from}_iter() bury generic_file_aio_{read,write} lustre: get rid of messing with iovecs ceph: switch to ->write_iter() ceph_sync_direct_write: stop poking into iov_iter guts ceph_sync_read: stop poking into iov_iter guts new helper: copy_page_from_iter() fuse: switch to ->write_iter() btrfs: switch to ->write_iter() ocfs2: switch to ->write_iter() xfs: switch to ->write_iter() ...
2014-06-12Merge commit '9f12600fe425bc28f0ccba034a77783c09c15af4' into for-linusAl Viro1-0/+6
Backmerge of dcache.c changes from mainline. It's that, or complete rebase... Conflicts: fs/splice.c Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-06-11Merge tag 'modules-next-for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module updates from Rusty Russell: "Most of this is cleaning up various driver sysfs permissions so we can re-add the perm check (we unified the module param and sysfs checks, but the module ones were stronger so we weakened them temporarily). Param parsing gets documented, and also "--" now forces args to be handed to init (and ignored by the kernel). Module NX/RO protections get tightened: we now set them before calling parse_args()" * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: module: set nx before marking module MODULE_STATE_COMING. samples/kobject/: avoid world-writable sysfs files. drivers/hid/hid-picolcd_fb: avoid world-writable sysfs files. drivers/staging/speakup/: avoid world-writable sysfs files. drivers/regulator/virtual: avoid world-writable sysfs files. drivers/scsi/pm8001/pm8001_ctl.c: avoid world-writable sysfs files. drivers/hid/hid-lg4ff.c: avoid world-writable sysfs files. drivers/video/fbdev/sm501fb.c: avoid world-writable sysfs files. drivers/mtd/devices/docg3.c: avoid world-writable sysfs files. speakup: fix incorrect perms on speakup_acntsa.c cpumask.h: silence warning with -Wsign-compare Documentation: Update kernel-parameters.tx param: hand arguments after -- straight to init modpost: Fix resource leak in read_dump()
2014-06-11Merge tag 'for-linus-20140610' of git://git.infradead.org/linux-mtdLinus Torvalds41-1609/+3360
Pull MTD updates from Brian Norris: - refactor m25p80.c driver for use as a general SPI NOR framework for other drivers which may speak to SPI NOR flash without providing full SPI support (i.e., not part of drivers/spi/) - new Freescale QuadSPI driver (utilizing new SPI NOR framework) - updates for the STMicro "FSM" SPI NOR driver - fix sync/flush behavior on mtd_blkdevs - fixup subpage write support on a few NAND drivers - correct the MTD OOB test for odd-sized OOB areas - add BCH-16 support for OMAP NAND - fix warnings and trivial refactoring - utilize new ECC DT bindings in pxa3xx NAND driver - new LPDDR NVM driver - address a few assorted bugs caught by Coverity - add new imx6sx support for GPMI NAND - use a bounce buffer for NAND when non-DMA-able buffers are used * tag 'for-linus-20140610' of git://git.infradead.org/linux-mtd: (77 commits) mtd: gpmi: add gpmi support for imx6sx mtd: maps: remove check for CONFIG_MTD_SUPERH_RESERVE mtd: bf5xx_nand: use the managed version of kzalloc mtd: pxa3xx_nand: make the driver work on big-endian systems mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop error mtd: nand: r852: correct write_buf loop bounds mtd: nand_bbt: handle error case for nand_create_badblock_pattern() mtd: nand_bbt: remove unused variable mtd: maps: sc520cdp: fix warnings mtd: slram: fix unused variable warning mtd: pfow: remove unused variable mtd: lpddr: fix Kconfig dependency, for I/O accessors mtd: nand: pxa3xx: Add supported ECC strength and step size to the DT binding mtd: nand: pxa3xx: Use ECC strength and step size devicetree binding mtd: nand: pxa3xx: Clean pxa_ecc_init() error handling mtd: nand: Warn the user if the selected ECC strength is too weak mtd: nand: omap: Documentation: How to select correct ECC scheme for your device ? mtd: nand: omap: add support for BCH16_ECC - NAND driver updates mtd: nand: omap: add support for BCH16_ECC - ELM driver updates mtd: nand: omap: add support for BCH16_ECC - GPMC driver updates ...
2014-06-10Merge tag 'upstream-3.16-rc1-v2' of git://git.infradead.org/linux-ubifsLinus Torvalds3-4/+6
Pull UBIFS updates from Artem Bityutskiy: "This contains several UBIFS fixes. One of them fixes a race condition between the mmap page fault path and fsync. Another just removes a bogus assertion from the UBIFS memory shrinker. UBIFS also started honoring the MS_SILENT mount flag, so now it won't print many I/O errors when user-space just tries to probe for the FS. Rest of the changes are rather minor UBI/UBIFS fixes, improvements, and clean-ups" * tag 'upstream-3.16-rc1-v2' of git://git.infradead.org/linux-ubifs: UBIFS: Add an assertion for clean_zn_cnt UBIFS: respect MS_SILENT mount flag UBIFS: Remove incorrect assertion in shrink_tnc() UBIFS: fix debugging check UBIFS: add missing ui pointer in debugging code UBI: block: Fix error path on alloc_workqueue failure UBIFS: Fix dump messages in ubifs_dump_lprops UBI: fix rb_tree node comparison in add_map UBIFS: Remove unused variables in ubifs_budget_space UBI: weaken the 'exclusive' constraint when opening volumes to rename UBIFS: fix an mmap and fsync race condition
2014-06-02Merge branch 'for-3.16/core' of git://git.kernel.dk/linux-block into nextLinus Torvalds2-3/+2
Pull block core updates from Jens Axboe: "It's a big(ish) round this time, lots of development effort has gone into blk-mq in the last 3 months. Generally we're heading to where 3.16 will be a feature complete and performant blk-mq. scsi-mq is progressing nicely and will hopefully be in 3.17. A nvme port is in progress, and the Micron pci-e flash driver, mtip32xx, is converted and will be sent in with the driver pull request for 3.16. This pull request contains: - Lots of prep and support patches for scsi-mq have been integrated. All from Christoph. - API and code cleanups for blk-mq from Christoph. - Lots of good corner case and error handling cleanup fixes for blk-mq from Ming Lei. - A flew of blk-mq updates from me: * Provide strict mappings so that the driver can rely on the CPU to queue mapping. This enables optimizations in the driver. * Provided a bitmap tagging instead of percpu_ida, which never really worked well for blk-mq. percpu_ida relies on the fact that we have a lot more tags available than we really need, it fails miserably for cases where we exhaust (or are close to exhausting) the tag space. * Provide sane support for shared tag maps, as utilized by scsi-mq * Various fixes for IO timeouts. * API cleanups, and lots of perf tweaks and optimizations. - Remove 'buffer' from struct request. This is ancient code, from when requests were always virtually mapped. Kill it, to reclaim some space in struct request. From me. - Remove 'magic' from blk_plug. Since we store these on the stack and since we've never caught any actual bugs with this, lets just get rid of it. From me. - Only call part_in_flight() once for IO completion, as includes two atomic reads. Hopefully we'll get a better implementation soon, as the part IO stats are now one of the more expensive parts of doing IO on blk-mq. From me. - File migration of block code from {mm,fs}/ to block/. This includes bio.c, bio-integrity.c, bounce.c, and ioprio.c. From me, from a discussion on lkml. That should describe the meat of the pull request. Also has various little fixes and cleanups from Dave Jones, Shaohua Li, Duan Jiong, Fengguang Wu, Fabian Frederick, Randy Dunlap, Robert Elliott, and Sam Bradshaw" * 'for-3.16/core' of git://git.kernel.dk/linux-block: (100 commits) blk-mq: push IPI or local end_io decision to __blk_mq_complete_request() blk-mq: remember to start timeout handler for direct queue block: ensure that the timer is always added blk-mq: blk_mq_unregister_hctx() can be static blk-mq: make the sysfs mq/ layout reflect current mappings blk-mq: blk_mq_tag_to_rq should handle flush request block: remove dead code in scsi_ioctl:blk_verify_command blk-mq: request initialization optimizations block: add queue flag for disabling SG merging block: remove 'magic' from struct blk_plug blk-mq: remove alloc_hctx and free_hctx methods blk-mq: add file comments and update copyright notices blk-mq: remove blk_mq_alloc_request_pinned blk-mq: do not use blk_mq_alloc_request_pinned in blk_mq_map_request blk-mq: remove blk_mq_wait_for_tags blk-mq: initialize request in __blk_mq_alloc_request blk-mq: merge blk_mq_alloc_reserved_request into blk_mq_alloc_request blk-mq: add helper to insert requests from irq context blk-mq: remove stale comment for blk_mq_complete_request() blk-mq: allow non-softirq completions ...
2014-05-28mtd: gpmi: add gpmi support for imx6sxHuang Shijie4-15/+28
The gpmi's IP for imx6sx is nearly the same as the gpmi's IP for imx6q, except the following two new features: (1) the new BCH contoller has 62-BIT correcting ECC strength (The BCH for imx6q only has 40-BIT ECC strength). (2) add the hardware Randomizer support. This patch does the follow changes: (1) add a new macro GPMI_IS_MX6SX to represent the imx6sx's gpmi. (2) add a new macro GPMI_IS_MX6. We use this macro to initialize the same registers for both imx6sx and imx6q, and so on. (3) add a new gpmi_devdata instance, the gpmi_devdata_imx6sx, for imx6sx. Signed-off-by: Huang Shijie <b32955@freescale.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-28mtd: maps: remove check for CONFIG_MTD_SUPERH_RESERVEPaul Bolle1-24/+1
Since (a few releases before) v2.6.0 there have been checks for CONFIG_MTD_SUPERH_RESERVE. One check is still present. But a Kconfig symbol MTD_SUPERH_RESERVE has never been added. So a few lines of dead code can be removed. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-28mtd: bf5xx_nand: use the managed version of kzallocHimangi Saraogi1-9/+4
This patch moves data allocated using kzalloc to managed data allocated using devm_kzalloc and cleans now unnecessary kfrees in probe and remove functions. Also, the now unnecessary label out_err_hw_init is done away with and the label out_err_kzalloc is renamed to out_err. The following Coccinelle semantic patch was used for making the change: @platform@ identifier p, probefn, removefn; @@ struct platform_driver p = { .probe = probefn, .remove = removefn, }; @prb@ identifier platform.probefn, pdev; expression e, e1, e2; @@ probefn(struct platform_device *pdev, ...) { <+... - e = kzalloc(e1, e2) + e = devm_kzalloc(&pdev->dev, e1, e2) ... ?-kfree(e); ...+> } @rem depends on prb@ identifier platform.removefn; expression e; @@ removefn(...) { <... - kfree(e); ...> } Signed-off-by: Himangi Saraogi <himangi774@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-28mtd: pxa3xx_nand: make the driver work on big-endian systemsThomas Petazzoni1-2/+2
The pxa3xx_nand driver currently uses __raw_writel() and __raw_readl() to access I/O registers. However, those functions do not do any endianness swapping, which means that they won't work when the CPU runs in big-endian but the I/O registers are little endian, which is the common situation for ARM systems running big endian. Since __raw_writel() and __raw_readl() do not include any memory barriers and the pxa3xx_nand driver can only be compiled for ARM platforms, the closest I/o accessors functions that do endianess swapping are writel_relaxed() and readl_relaxed(). This patch has been verified to work on Armada XP GP: without the patch, the NAND is not detected when the kernel runs big endian while it is properly detected when the kernel runs little endian. With the patch applied, the NAND is properly detected in both situations (little and big endian). Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: <stable@vger.kernel.org> # v3.13+ Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-28mtd: nand: omap: fix omap_calculate_ecc_bch() for-loop errorTed Juan1-5/+5
Fixes: 2c9f2365d1e1d0e318b068f683f18c99515b80f8 mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch4 in omap_calculate_ecc_bch Fixes: 7bcd1dca1d587ad29f9825ba4414620440e8c8da mtd: nand: omap: ecc.calculate: merge omap3_calculate_ecc_bch8 in omap_calculate_ecc_bch Cc: <stable@vger.kernel.org> # 3.13.x+ Signed-off-by: Ted Juan <ted.juan@gmail.com> Acked-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-28mtd: nand: r852: correct write_buf loop boundsBrian Norris1-2/+4
The two loops in r852_write_buf() are designed to handle 4-byte-aligned and then 1-byte-aligned portions, respectively. However, there are two issues: (1) The first loop will only terminate if 'len' is a multiple of 4 (2) The second loop will never terminate if it runs at least once Rewrite these loops as they were probably intended. Compile tested only. Issues pointed out by Coverity Scan. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Cc: Maxim Levitsky <maximlevitsky@gmail.com>
2014-05-28mtd: nand_bbt: handle error case for nand_create_badblock_pattern()Brian Norris1-2/+6
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-28mtd: nand_bbt: remove unused variableBrian Norris1-4/+1
Set, but unused, variable. Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-28mtd: maps: sc520cdp: fix warningsBrian Norris1-3/+3
On m86k, and maybe a few other architectures, we get this kind of warning, due to misuse of volatile: drivers/mtd/maps/sc520cdp.c: In function 'sc520cdp_setup_par': >> drivers/mtd/maps/sc520cdp.c:223:2: warning: passing argument 1 of 'iounmap' discards 'volatile' qualifier from pointer target type [enabled by default] arch/m68k/include/asm/raw_io.h:22:13: note: expected 'void *' but argument is of type 'volatile long unsigned int *' Rather than annotating the variable declaration, let's just use the proper accessors, which add the 'volatile' qualifier to the operation. Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-28mtd: slram: fix unused variable warningBrian Norris1-3/+1
drivers/mtd/devices/slram.c: In function 'init_slram': drivers/mtd/devices/slram.c:283:6: warning: variable 'i' set but not used [-Wunused-but-set-variable] Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-27UBI: block: Fix error path on alloc_workqueue failureHelmut Schaa1-1/+3
Otherwise we'd return a random value if allocation of the workqueue fails. Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com> Acked-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-05-26mtd: lpddr: fix Kconfig dependency, for I/O accessorsBrian Norris1-1/+2
Not all architectures implement a writel_relaxed() accessor. Hopefully this will change eventually, but for now, this means lpddr2_nvm.c can't compile on some architectures. Let's add an ARM dependency for now, and leave a comment so maybe we can change this in the future. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Cc: Vincenzo Aliberti <vincenzo.aliberti@gmail.com>
2014-05-21mtd: nand: pxa3xx: Use ECC strength and step size devicetree bindingEzequiel Garcia1-2/+15
This commit adds support for the user to specify the ECC strength and step size through the devicetree. We keep the previous behavior, when there is no DT parameter provided. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-21mtd: nand: pxa3xx: Clean pxa_ecc_init() error handlingEzequiel Garcia1-11/+10
Let's make pxa_ecc_init() return a negative errno on error or zero if succesful, which is standard kernel practice. Also, report the selected ECC strength and step size, which is important information. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-21mtd: nand: Warn the user if the selected ECC strength is too weakEzequiel Garcia1-0/+36
This commit makes use of the chip->ecc_strength_ds and chip->ecc_step_ds which contain the datasheet minimum requested ECC strength to produce a noisy warning if the configured ECC strength is weaker. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: nand: omap: add support for BCH16_ECC - NAND driver updatespekon gupta1-0/+94
This patch add support for BCH16 ecc-scheme in OMAP NAND driver, by extending following functions: - omap_enable_hwecc (nand_chip->ecc.hwctl): configure GPMC controller - omap_calculate_ecc_bch (nand_chip->ecc.calculate): fetch ECC signature from GPMC controller - omap_elm_correct_data (nand_chip->ecc.correct): detect and correct ECC errors using ELM (a) BCH16 ecc-scheme can detect and correct 16 bit-flips per 512Bytes of data. (b) BCH16 ecc-scheme generates 26-bytes of ECC syndrome / 512B. Due to (b) this scheme can only be used with NAND devices which have enough OOB to satisfy the relation: "OOBsize per page >= 26 * (page-size / 512)" Signed-off-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: nand: omap: add support for BCH16_ECC - ELM driver updatespekon gupta1-0/+36
ELM hardware engine is used to detect ECC errors for BCHx ecc-schemes (like BCH4/BCH8/BCH16). This patch extends configuration of ELM registers for adding support of BCH16_HW ecc-scheme. Signed-off-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20NAND_ECC_SOFT_BCH can support subpage reads tooRon Lee1-2/+10
Signed-off-by: Ron Lee <ron@debian.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: lpddr: add driver for LPDDR2-NVM PCM memoriesVincenzo Aliberti3-2/+518
Signed-off-by: Vincenzo Aliberti <vincenzo.aliberti@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: Kconfig: give the CFI command set version in prompt and helpPhilippe De Muyter1-8/+8
Enhances the help for the CFI command set choices. Signed-off-by: Philippe De Muyter <phdm@macqel.be> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: fsl_ifc_nand: Workaround bogus WP on 16-bit NANDJoe Schultz1-1/+4
A workaround was already in place that set the WP bit in the IFC_CSPR0 register after a STATUS command, however it used an 8-bit write method. As a result, the WP bit was never set on 16-bit devices, and these devices would eventually be incorrectly marked as write-protected. This patch checks the chip options for a 16-bit device and uses the appropriate write method to set the WP bit after a STATUS command. Signed-off-by: Joe Schultz <jschultz@xes-inc.com> Signed-off-by: Aaron Sierra <asierra@xes-inc.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: fsl_ifc_nand: Use void type for IFC bufferAaron Sierra1-7/+9
The IFC buffer is accessed via 8-bit and 16-bit accessors. Changing the 'addr' member of 'struct fsl_ifc_nand_ctrl' from 'u8 __iomem *' to 'void __iomem *' eliminates the need for explicit casts when the 16-bit accessors are used. Signed-off-by: Aaron Sierra <asierra@xes-inc.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: cfi: indent some if statementsDan Carpenter2-3/+3
The break statements should be indented another tab. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: nand: Add support to use nand_base poi databuf as bounce bufferKamal Dasu1-6/+31
nand_base can be passed a kmap()'d buffers from highmem by filesystems like jffs2. This results in failure to map the physical address of the DMA buffer on various contoller driver on different platforms. This change adds a chip option to use preallocated databuf as bounce buffers used in nand_do_read_ops() and nand_do_write_ops(). This allows for specific nand controller driver to set this option as needed. Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: eLBC NAND: fix subpage write supportPekon Gupta1-0/+14
As subpage write is enabled by default for all drivers, nand_write_subpage_hwecc causes a crash if the driver did not register ecc->hwctl or ecc->calculate. This behavior was introduced in commit 837a6ba4f3b6d23026674e6af6b6849a4634fff9 "mtd: nand: subpage write support for hardware based ECC schemes". This fixes a crash by emulating subpage write support by padding sub-page data with 0xff on either sides to make it full page compatible. Reported-by: Helmut Schaa <helmut.schaa@googlemail.com> Tested-by: Helmut Schaa <helmut.schaa@googlemail.com> Signed-off-by: Pekon Gupta <pekon@ti.com> Reviewed-by: Scott Wood <scottwood@freescale.com> Cc: <stable@vger.kernel.org> # 3.10.x+ Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: onenand: fix build warning for dma typeArnd Bergmann1-4/+4
The samsung onenand driver passes around a dma address token through a void pointer, which is incorrect and leads to warnings like this one: onenand/samsung.c:548:2: warning: passing argument 1 of '__fswab32' makes integer from pointer without a cast [enabled by default] writel(src, base + S5PC110_DMA_SRC_ADDR); ^ This patch makes it use dma_addr_t here, which is more appropriate. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: linux-mtd@lists.infradead.org Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: orion_nand: Make of_device_id array constJingoo Han1-1/+1
Make of_device_id array const, because all OF functions handle it as const. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: nand: pxa3xx: Make of_device_id array constJingoo Han1-1/+1
Make of_device_id array const, because all OF functions handle it as const. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Jason Cooper <jason@lakedaemon.net> Acked-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: st_spi_fsm: Make of_device_id array constJingoo Han1-1/+1
Make of_device_id array const, because all OF functions handle it as const. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: Fix warning in access_ok() parameter passingGeert Uytterhoeven1-9/+11
On m68k, where access_ok() doesn't cast the address parameter: drivers/mtd/mtdchar.c: In function 'mtdchar_write_ioctl': drivers/mtd/mtdchar.c:575:4: warning: passing argument 2 of 'access_ok' makes pointer from integer without a cast [enabled by default] arch/m68k/include/asm/uaccess_mm.h:17:90: note: expected 'const void *' but argument is of type '__u64' drivers/mtd/mtdchar.c:576:4: warning: passing argument 2 of 'access_ok' makes pointer from integer without a cast [enabled by default] arch/m68k/include/asm/uaccess_mm.h:17:90: note: expected 'const void *' but argument is of type '__u64' The address parameter of access_ok() is really a userspace pointer. On most architectures, access_ok() is a macro that casts the address parameter, hiding issues in its users. Move around and use the existing usr_data and usr_oob temporary variables to kill the warnings. Add a few "consts", and make more use of the temporaries while we're at it. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-20mtd: nand: omap: fix BCHx ecc.correct to return detected bit-flips in ↵pekon gupta1-1/+1
erased-page fixes: commit 62116e5171e00f85a8d53f76e45b84423c89ff34 mtd: nand: omap2: Support for hardware BCH error correction. In omap_elm_correct_data(), if bitflip_count in an erased-page is within the correctable limit (< ecc.strength), then it is not indicated back to the caller ecc->read_page(). This mis-guides upper layers like MTD and UBIFS layer to assume erased-page as perfectly clean and use it for writing even if actual bitflip_count was dangerously high (bitflip_count > mtd->bitflip_threshold). This patch fixes this above issue, by returning 'stats' to caller ecc->read_page() under all scenarios. Reported-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Pekon Gupta <pekon@ti.com> Cc: <stable@vger.kernel.org> # 3.9.x+ Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-14drivers/mtd/devices/docg3.c: avoid world-writable sysfs files.Rusty Russell1-2/+2
In line with practice for module parameters, we're adding a build-time check that sysfs files aren't world-writable. Cc: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-05-13UBI: fix rb_tree node comparison in add_mapMike Snitzer1-2/+2
The comparisons used in add_vol() shouldn't be identical. Pretty sure the following is correct but it is completely untested. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: Richard Weinberger <richard@nod.at> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-05-13UBI: weaken the 'exclusive' constraint when opening volumes to renameEzequiel Garcia1-1/+1
The UBI volume rename ioctl (UBI_IOCRNVOL) open the volumes in exclusive mode. The volumes are opened for two reasons: to build a volume rename list, and a volume remove list. However, the first open constraint is excessive and can be replaced by a 'read-write' open mode. The second open constraint is properly set as 'exclusive' given the volume is opened for removal and we don't want any users around. By weakening the former 'exclusive' mode, we allow 'read-only' users to keep the volume open, while a rename is taking place. This is useful to perform an atomic rename, in a firmware upgrade scenario, while keeping the volume in read-only use (for instance, if a ubiblock is mounted as rootfs). It's worth mention this is not the case of UBIFS, which keeps the volume opened as 'read-write' despite mounted as read-write or read-only mode. This change was suggested at least twice by Artem: http://lists.infradead.org/pipermail/linux-mtd/2012-September/044175.html http://permalink.gmane.org/gmane.linux.drivers.mtd/39866 Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-05-12mtd: spi-nor: Enable Dual and Quad SPI read transfers for s25sl032pGeert Uytterhoeven1-1/+1
Spansion s25sl032p supports Dual and Quad SPI transfers, hence set the SPI_NOR_DUAL_READ and SPI_NOR_QUAD_READ flags. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-12mtd: m25p80: Revive dual read supportGeert Uytterhoeven1-0/+2
Commit 03e296f613affcc2671c1e86d8c25ecad867204e ("mtd: m25p80: use the SPI nor framework") accidentally removed support for Dual SPI read transfers. Add it back. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Huang Shijie <shijie8@gmail.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-12mtd: elm: compile suspend/resume only with PM_SLEEPWolfram Sang1-0/+2
Fixes: drivers/mtd/devices/elm.c:480:12: warning: 'elm_suspend' defined but not used [-Wunused-function] drivers/mtd/devices/elm.c:488:12: warning: 'elm_resume' defined but not used [-Wunused-function] Signed-off-by: Wolfram Sang <wsa@sang-engineering.com> Acked-by: Pekon Gupta <pekon@ti.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-12mtd: Fix Elan SC520 dependenciesJean Delvare1-2/+2
Anyone working with an AMD Elan SC520 development or evaluation board would be building a dedicated kernel for it, so we can make the sc520cdp and netsc520 maps depend on MELAN. SC520_CPUFREQ already depends on MELAN so it makes things more consistent. It also makes kernel configuration for every other x86 user easier. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2014-05-09mtd: nand: refactor erase_cmd() to return chip statusBrian Norris3-13/+14
The nand_chip::erase_cmd callback previously served a dual purpose; for one, it allowed a per-flash-chip override, so that AG-AND devices could use a different erase command than other NAND. These AND devices were dropped in commit 14c6578683367b1e7af0c3c09e872b45a45183a7 (mtd: nand: remove AG-AND support). On the other hand, some drivers (denali and doc-g4) need to use this sort of callback to implement controller-specific erase operations. To make the latter operation easier for some drivers (e.g., ST's new BCH NAND driver), it helps if the command dispatch and wait functions can be lumped together, rather than called separately. This patch does two things: 1. Pull the call to chip->waitfunc() into chip->erase_cmd(), and return the status from this callback 2. Rename erase_cmd() to just erase(), since this callback does a little more than just send a command Signed-off-by: Brian Norris <computersforpeace@gmail.com> Tested-by: Lee Jones <lee.jones@linaro.org>
2014-05-07Merge tag 'for-linus-20140507' of git://git.infradead.org/linux-mtdLinus Torvalds1-0/+6
Pull MTD fix from Brian Norris: "A single update for Keystone SoC's, whose NAND controller does not support subpage programming" * tag 'for-linus-20140507' of git://git.infradead.org/linux-mtd: mtd: davinci-nand: disable subpage write for keystone-nand
2014-05-06replace checking for ->read/->aio_read presence with check in ->f_modeAl Viro1-2/+2
Since we are about to introduce new methods (read_iter/write_iter), the tests in a bunch of places would have to grow inconveniently. Check once (at open() time) and store results in ->f_mode as FMODE_CAN_READ and FMODE_CAN_WRITE resp. It might end up being a temporary measure - once everything switches from ->aio_{read,write} to ->{read,write}_iter it might make sense to return to open-coded checks. We'll see... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-05-05UBI: avoid workqueue format string leakKees Cook1-1/+1
When building the name for the workqueue thread, make sure a format string cannot leak in from the disk name. Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2014-05-05UBI: fix ubi free PEBs count calculationTanya Brokhman1-0/+3
The ubi->free_count should be updated with every insert/remove to/from the ubi->free list. Signed-off-by: Tanya Brokhman <tlinder@codeaurora.org> Reviewed-by: Dolev Raviv <draviv@codeaurora.org> Acked-by: Richard Weinberger <richard@nod.at> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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