- 05 10月, 2013 1 次提交
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由 Bjorn Helgaas 提交于
This reverts commit 07f9b61c. 07f9b61c was intended to be a cleanup that didn't change anything, but in fact, for systems without _CBA (which is almost everything), it broke extended config space for domain 0 and all config space for other domains. Reference: http://lkml.kernel.org/r/20131004011806.GE20450@dangermouse.emea.sgi.comReported-by: NHedi Berriche <hedi@sgi.com> Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
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- 24 9月, 2013 3 次提交
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由 Linus Torvalds 提交于
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging由 Linus Torvalds 提交于
Pull staging fixes from Greg KH: "Here are a number of small staging tree and iio driver fixes. Nothing major, just lots of little things" * tag 'staging-3.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (34 commits) iio:buffer_cb: Add missing iio_buffer_init() iio: Prevent race between IIO chardev opening and IIO device free iio: fix: Keep a reference to the IIO device for open file descriptors iio: Stop sampling when the device is removed iio: Fix crash when scan_bytes is computed with active_scan_mask == NULL iio: Fix mcp4725 dev-to-indio_dev conversion in suspend/resume iio: Fix bma180 dev-to-indio_dev conversion in suspend/resume iio: Fix tmp006 dev-to-indio_dev conversion in suspend/resume iio: iio_device_add_event_sysfs() bugfix staging: iio: ade7854-spi: Fix return value staging:iio:hmc5843: Fix measurement conversion iio: isl29018: Fix uninitialized value staging:iio:dummy fix kfifo_buf kconfig dependency issue if kfifo modular and buffer enabled for built in dummy driver. iio: at91: fix adc_clk overflow staging: line6: add bounds check in snd_toneport_source_put() Staging: comedi: Fix dependencies for drivers misclassified as PCI staging: r8188eu: Adjust RX gain staging: r8188eu: Fix smatch warning in core/rtw_ieee80211. staging: r8188eu: Fix smatch error in core/rtw_mlme_ext.c staging: r8188eu: Fix Smatch off-by-one warning in hal/rtl8188e_hal_init.c ...
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb由 Linus Torvalds 提交于
Pull USB fixes from Greg KH: "Here are a number of small USB fixes for 3.12-rc2. One is a revert of a EHCI change that isn't quite ready for 3.12. Others are minor things, gadget fixes, Kconfig fixes, and some quirks and documentation updates. All have been in linux-next for a bit" * tag 'usb-3.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: USB: pl2303: distinguish between original and cloned HX chips USB: Faraday fotg210: fix email addresses USB: fix typo in usb serial simple driver Kconfig Revert "USB: EHCI: support running URB giveback in tasklet context" usb: s3c-hsotg: do not disconnect gadget when receiving ErlySusp intr usb: s3c-hsotg: fix unregistration function usb: gadget: f_mass_storage: reset endpoint driver data when disabled usb: host: fsl-mph-dr-of: Staticize local symbols usb: gadget: f_eem: Staticize eem_alloc usb: gadget: f_ecm: Staticize ecm_alloc usb: phy: omap-usb3: Fix return value usb: dwc3: gadget: avoid memory leak when failing to allocate all eps usb: dwc3: remove extcon dependency usb: gadget: add '__ref' for rndis_config_register() and cdc_config_register() usb: dwc3: pci: add support for BayTrail usb: gadget: cdc2: fix conversion to new interface of f_ecm usb: gadget: fix a bug and a WARN_ON in dummy-hcd usb: gadget: mv_u3d_core: fix violation of locking discipline in mv_u3d_ep_disable()
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- 23 9月, 2013 4 次提交
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git://people.freedesktop.org/~airlied/linux由 Linus Torvalds 提交于
Pull drm fixes from Dave Airlie: - some small fixes for msm and exynos - a regression revert affecting nouveau users with old userspace - intel pageflip deadlock and gpu hang fixes, hsw modesetting hangs * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (22 commits) Revert "drm: mark context support as a legacy subsystem" drm/i915: Don't enable the cursor on a disable pipe drm/i915: do not update cursor in crtc mode set drm/exynos: fix return value check in lowlevel_buffer_allocate() drm/exynos: Fix address space warnings in exynos_drm_fbdev.c drm/exynos: Fix address space warning in exynos_drm_buf.c drm/exynos: Remove redundant OF dependency drm/msm: drop unnecessary set_need_resched() drm/i915: kill set_need_resched drm/msm: fix potential NULL pointer dereference drm/i915/dvo: set crtc timings again for panel fixed modes drm/i915/sdvo: Robustify the dtd<->drm_mode conversions drm/msm: workaround for missing irq drm/msm: return -EBUSY if bo still active drm/msm: fix return value check in ERR_PTR() drm/msm: fix cmdstream size check drm/msm: hangcheck harder drm/msm: handle read vs write fences drm/i915/sdvo: Fully translate sync flags in the dtd->mode conversion drm/i915: Use proper print format for debug prints ...
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git://git.kernel.dk/linux-block由 Linus Torvalds 提交于
Pull block IO fixes from Jens Axboe: "After merge window, no new stuff this time only a collection of neatly confined and simple fixes" * 'for-3.12/core' of git://git.kernel.dk/linux-block: cfq: explicitly use 64bit divide operation for 64bit arguments block: Add nr_bios to block_rq_remap tracepoint If the queue is dying then we only call the rq->end_io callout. This leaves bios setup on the request, because the caller assumes when the blk_execute_rq_nowait/blk_execute_rq call has completed that the rq->bios have been cleaned up. bio-integrity: Fix use of bs->bio_integrity_pool after free blkcg: relocate root_blkg setting and clearing block: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...) block: trace all devices plug operation
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git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs由 Linus Torvalds 提交于
Pull btrfs fixes from Chris Mason: "These are mostly bug fixes and a two small performance fixes. The most important of the bunch are Josef's fix for a snapshotting regression and Mark's update to fix compile problems on arm" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (25 commits) Btrfs: create the uuid tree on remount rw btrfs: change extent-same to copy entire argument struct Btrfs: dir_inode_operations should use btrfs_update_time also btrfs: Add btrfs: prefix to kernel log output btrfs: refuse to remount read-write after abort Btrfs: btrfs_ioctl_default_subvol: Revert back to toplevel subvolume when arg is 0 Btrfs: don't leak transaction in btrfs_sync_file() Btrfs: add the missing mutex unlock in write_all_supers() Btrfs: iput inode on allocation failure Btrfs: remove space_info->reservation_progress Btrfs: kill delay_iput arg to the wait_ordered functions Btrfs: fix worst case calculator for space usage Revert "Btrfs: rework the overcommit logic to be based on the total size" Btrfs: improve replacing nocow extents Btrfs: drop dir i_size when adding new names on replay Btrfs: replay dir_index items before other items Btrfs: check roots last log commit when checking if an inode has been logged Btrfs: actually log directory we are fsync()'ing Btrfs: actually limit the size of delalloc range Btrfs: allocate the free space by the existed max extent size when ENOSPC ...
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由 Anatol Pomozov 提交于
'samples' is 64bit operant, but do_div() second parameter is 32. do_div silently truncates high 32 bits and calculated result is invalid. In case if low 32bit of 'samples' are zeros then do_div() produces kernel crash. Signed-off-by: NAnatol Pomozov <anatol.pomozov@gmail.com> Acked-by: NTejun Heo <tj@kernel.org> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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- 22 9月, 2013 3 次提交
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由 Greg Kroah-Hartman 提交于
Merge tag 'iio-fixes-for-3.12a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus Jonathan writes: First round of IIO fixes for 3.12 A series of wrong 'struct dev' assumptions in suspend/resume callbacks following on from this issue being identified in a new driver review. One to watch out for in future. A number of driver specific fixes 1) at91 - fix a overflow in clock rate computation 2) dummy - Kconfig dependency issue 3) isl29018 - uninitialized value 4) hmc5843 - measurement conversion bug introduced by recent cleanup. 5) ade7854-spi - wrong return value. Some IIO core fixes 1) Wrong value picked up for event code creation for a modified channel 2) A null dereference on failure to initialize a buffer after no buffer has been in use, when using the available_scan_masks approach. 3) Sampling not stopped when a device is removed. Effects forced removal such as hot unplugging. 4) Prevent device going away if a chrdev is still open in userspace. 5) Prevent race on chardev opening and device being freed. 6) Add a missing iio_buffer_init in the call back buffer. These last few are the first part of a set from Lars-Peter Clausen who has been taking a closer look at our removal paths and buffer handling than anyone has for quite some time.
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git://git.linux-nfs.org/projects/trondmy/linux-nfs由 Linus Torvalds 提交于
Pull NFS client bugfix from Trond Myklebust: "Fix a regression due to incorrect sharing of gss auth caches" * tag 'nfs-for-3.12-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: RPCSEC_GSS: fix crash on destroying gss auth
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由 Jun'ichi Nomura 提交于
Adding the number of bios in a remapped request to 'block_rq_remap' tracepoint. Request remapper clones bios in a request to track the completion status of each bio. So the number of bios can be useful information for investigation. Related discussions: http://www.redhat.com/archives/dm-devel/2013-August/msg00084.html http://www.redhat.com/archives/dm-devel/2013-September/msg00024.htmlSigned-off-by: NJun'ichi Nomura <j-nomura@ce.jp.nec.com> Acked-by: NMike Snitzer <snitzer@redhat.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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- 21 9月, 2013 29 次提交
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由 Josef Bacik 提交于
Users have been complaining of the uuid tree stuff warning that there is no uuid root when trying to do snapshot operations. This is because if you mount -o ro we will not create the uuid tree. But then if you mount -o rw,remount we will still not create it and then any subsequent snapshot/subvol operations you try to do will fail gloriously. Fix this by creating the uuid_root on remount rw if it was not already there. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Mark Fasheh 提交于
btrfs_ioctl_file_extent_same() uses __put_user_unaligned() to copy some data back to it's argument struct. Unfortunately, not all architectures provide __put_user_unaligned(), so compiles break on them if btrfs is selected. Instead, just copy the whole struct in / out at the start and end of operations, respectively. Signed-off-by: NMark Fasheh <mfasheh@suse.de> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Guangyu Sun 提交于
Commit 2bc55652 (Btrfs: don't update atime on RO subvolumes) ensures that the access time of an inode is not updated when the inode lives in a read-only subvolume. However, if a directory on a read-only subvolume is accessed, the atime is updated. This results in a write operation to a read-only subvolume. I believe that access times should never be updated on read-only subvolumes. To reproduce: # mkfs.btrfs -f /dev/dm-3 (...) # mount /dev/dm-3 /mnt # btrfs subvol create /mnt/sub Create subvolume '/mnt/sub' # mkdir /mnt/sub/dir # echo "abc" > /mnt/sub/dir/file # btrfs subvol snapshot -r /mnt/sub /mnt/rosnap Create a readonly snapshot of '/mnt/sub' in '/mnt/rosnap' # stat /mnt/rosnap/dir File: `/mnt/rosnap/dir' Size: 8 Blocks: 0 IO Block: 4096 directory Device: 16h/22d Inode: 257 Links: 1 Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2013-09-11 07:21:49.389157126 -0400 Modify: 2013-09-11 07:22:02.330156079 -0400 Change: 2013-09-11 07:22:02.330156079 -0400 # ls /mnt/rosnap/dir file # stat /mnt/rosnap/dir File: `/mnt/rosnap/dir' Size: 8 Blocks: 0 IO Block: 4096 directory Device: 16h/22d Inode: 257 Links: 1 Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2013-09-11 07:22:56.797151670 -0400 Modify: 2013-09-11 07:22:02.330156079 -0400 Change: 2013-09-11 07:22:02.330156079 -0400 Reported-by: NKoen De Wit <koen.de.wit@oracle.com> Signed-off-by: NGuangyu Sun <guangyu.sun@oracle.com> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Frank Holton 提交于
The kernel log entries for device label %s and device fsid %pU are missing the btrfs: prefix. Add those here. Signed-off-by: NFrank Holton <fholton@gmail.com> Reviewed-by: NDavid Sterba <dsterba@suse.cz> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 David Sterba 提交于
It's still possible to flip the filesystem into RW mode after it's remounted RO due to an abort. There are lots of places that check for the superblock error bit and will not write data, but we should not let the filesystem appear read-write. Signed-off-by: NDavid Sterba <dsterba@suse.cz> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 chandan 提交于
This patch makes it possible to set BTRFS_FS_TREE_OBJECTID as the default subvolume by passing a subvolume id of 0. Signed-off-by: Nchandan <chandan@linux.vnet.ibm.com> Reviewed-by: NDavid Sterba <dsterba@suse.cz> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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In btrfs_sync_file(), if the call to btrfs_log_dentry_safe() returns a negative error (for e.g. -ENOMEM via btrfs_log_inode()), we would return without ending/freeing the transaction. Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Stefan Behrens 提交于
The BUG() was replaced by btrfs_error() and return -EIO with the patch "get rid of one BUG() in write_all_supers()", but the missing mutex_unlock() was overlooked. The 0-DAY kernel build service from Intel reported the missing unlock which was found by the coccinelle tool: fs/btrfs/disk-io.c:3422:2-8: preceding lock on line 3374 Signed-off-by: NStefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
We don't do the iput when we fail to allocate our delayed delalloc work in __start_delalloc_inodes, fix this. Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
This isn't used for anything anymore, just remove it. Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
This is a left over of how we used to wait for ordered extents, which was to grab the inode and then run filemap flush on it. However if we have an ordered extent then we already are holding a ref on the inode, and we just use btrfs_start_ordered_extent anyway, so there is no reason to have an extra ref on the inode to start work on the ordered extent. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
Forever ago I made the worst case calculator say that we could potentially split into 3 blocks for every level on the way down, which isn't right. If we split we're only going to get two new blocks, the one we originally cow'ed and the new one we're going to split. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
This reverts commit 70afa399. It is causing performance issues and wasn't actually correct. There were problems with the way we flushed delalloc and that was the real cause of the early enospc. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
Various people have hit a deadlock when running btrfs/011. This is because when replacing nocow extents we will take the i_mutex to make sure nobody messes with the file while we are replacing the extent. The problem is we are already holding a transaction open, which is a locking inversion, so instead we need to save these inodes we find and then process them outside of the transaction. Further we can't just lock the inode and assume we are good to go. We need to lock the extent range and then read back the extent cache for the inode to make sure the extent really still points at the physical block we want. If it doesn't we don't have to copy it. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
So if we have dir_index items in the log that means we also have the inode item as well, which means that the inode's i_size is correct. However when we process dir_index'es we call btrfs_add_link() which will increase the directory's i_size for the new entry. To fix this we need to just set the dir items i_size to 0, and then as we find dir_index items we adjust the i_size. btrfs_add_link() will do it for new entries, and if the entry already exists we can just add the name_len to the i_size ourselves. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
A user reported a bug where his log would not replay because he was getting -EEXIST back. This was because he had a file moved into a directory that was logged. What happens is the file had a lower inode number, and so it is processed first when replaying the log, and so we add the inode ref in for the directory it was moved to. But then we process the directories DIR_INDEX item and try to add the inode ref for that inode and it fails because we already added it when we replayed the inode. To solve this problem we need to just process any DIR_INDEX items we have in the log first so this all is taken care of, and then we can replay the rest of the items. With this patch my reproducer can remount the file system properly instead of erroring out. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
Liu introduced a local copy of the last log commit for an inode to make sure we actually log an inode even if a log commit has already taken place. In order to make sure we didn't relog the same inode multiple times he set this local copy to the current trans when we log the inode, because usually we log the inode and then sync the log. The exception to this is during rename, we will relog an inode if the name changed and it is already in the log. The problem with this is then we go to sync the inode, and our check to see if the inode has already been logged is tripped and we don't sync the log. To fix this we need to _also_ check against the roots last log commit, because it could be less than what is in our local copy of the log commit. This fixes a bug where we rename a file into a directory and then fsync the directory and then on remount the directory is no longer there. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
If you just create a directory and then fsync that directory and then pull the power plug you will come back up and the directory will not be there. That is because we won't actually create directories if we've logged files inside of them since they will be created on replay, but in this check we will set our logged_trans of our current directory if it happens to be a directory, making us think it doesn't need to be logged. Fix the logic to only do this to parent directories. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
So forever we have had this thing to limit the amount of delalloc pages we'll setup to be written out to 128mb. This is because we have to lock all the pages in this range, so anything above this gets a bit unweildly, and also without a limit we'll happily allocate gigantic chunks of disk space. Turns out our check for this wasn't quite right, we wouldn't actually limit the chunk we wanted to write out, we'd just stop looking for more space after we went over the limit. So if you do a giant 20gb dd on my box with lots of ram I could get 2gig extents. This is fine normally, except when you go to relocate these extents and we can't find enough space to relocate these moster extents, since we have to be able to allocate exactly the same sized extent to move it around. So fix this by actually enforcing the limit. With this patch I'm no longer seeing giant 1.5gb extents. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Miao Xie 提交于
By the current code, if the requested size is very large, and all the extents in the free space cache are small, we will waste lots of the cpu time to cut the requested size in half and search the cache again and again until it gets down to the size the allocator can return. In fact, we can know the max extent size in the cache after the first search, so we needn't cut the size in half repeatedly, and just use the max extent size directly. This way can save lots of cpu time and make the performance grow up when there are only fragments in the free space cache. According to my test, if there are only 4KB free space extents in the fs, and the total size of those extents are 256MB, we can reduce the execute time of the following test from 5.4s to 1.4s. dd if=/dev/zero of=<testfile> bs=1MB count=1 oflag=sync Changelog v2 -> v3: - fix the problem that we skip the block group with the space which is less than we need. Changelog v1 -> v2: - address the problem that we return a wrong start position when searching the free space in a bitmap. Signed-off-by: NMiao Xie <miaox@cn.fujitsu.com> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 David Sterba 提交于
Signed-off-by: NDavid Sterba <dsterba@suse.cz> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Stefan Behrens 提交于
We want to know if there are debugging features compiled in, this may affect performance. The message is printed before the sanity checks. (This commit message is a copy of David Sterba's commit message when he introduced btrfs_print_info()). Signed-off-by: NStefan Behrens <sbehrens@giantdisaster.de> Reviewed-by: NDavid Sterba <dsterba@suse.cz> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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Instead of removing the current inode from the red black tree and then add the new one, just use the red black tree replace operation, which is more efficient. Signed-off-by: NFilipe David Borba Manana <fdmanana@gmail.com> Reviewed-by: NZach Brown <zab@redhat.com> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Ilya Dryomov 提交于
If replace was suspended by the umount, replace target device is added to the fs_devices->alloc_list during a later mount. This is obviously wrong. ->is_tgtdev_for_dev_replace is supposed to guard against that, but ->is_tgtdev_for_dev_replace is (and can only ever be) initialized *after* everything is opened and fs_devices lists are populated. Fix this by checking the devid instead: for replace targets it's always equal to BTRFS_DEV_REPLACE_DEVID. Cc: Stefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: NIlya Dryomov <idryomov@gmail.com> Reviewed-by: NStefan Behrens <sbehrens@giantdisaster.de> Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Josef Bacik 提交于
If we failed to actually allocate the correct size of the extent to relocate we will end up in an infinite loop because we won't return an error, we'll just move on to the next extent. So fix this up by returning an error, and then fix all the callers to return an error up the stack rather than BUG_ON()'ing. Thanks, Signed-off-by: NJosef Bacik <jbacik@fusionio.com> Signed-off-by: NChris Mason <chris.mason@fusionio.com>
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由 Chris Mason 提交于
Linux 3.11
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由 Lars-Peter Clausen 提交于
Make sure to properly initialize the IIO buffer data structure. Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Signed-off-by: NJonathan Cameron <jic23@kernel.org>
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由 Lars-Peter Clausen 提交于
Set the IIO device as the parent for the character device We need to make sure that the IIO device is not freed while the character device exists, otherwise the freeing of the IIO device might race against the file open callback. Do this by setting the character device's parent to the IIO device, this will cause the character device to grab a reference to the IIO device and only release it once the character device itself has been removed. Also move the registration of the character device before the registration of the IIO device to avoid the (rather theoretical case) that the IIO device is already freed again before we can add the character device and grab a reference to the IIO device. We also need to move the call to cdev_del() from iio_dev_release() to iio_device_unregister() (where it should have been in the first place anyway) to avoid a reference cycle. As iio_dev_release() is only called once all reference are dropped, but the character device holds a reference to the IIO device. Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Signed-off-by: NJonathan Cameron <jic23@kernel.org>
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由 Lars-Peter Clausen 提交于
Make sure that the IIO device is not freed while we still have file descriptors for it. Signed-off-by: NLars-Peter Clausen <lars@metafoo.de> Signed-off-by: NJonathan Cameron <jic23@kernel.org>
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