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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-05 11:08:17 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-05 11:08:17 -0700 |
commit | bafb0762cb6a906eb4105cccfb3bcd90be7f40d2 (patch) | |
tree | 14ecb87c33bcf909e5b95c27cd694ded4ac1478c /block | |
parent | 44b1671fae88ce95b8c7b53acbc6ba71ca67db00 (diff) | |
parent | 3a6430ce462172caac7c73f4afd550ab0f105737 (diff) | |
download | linux-bafb0762cb6a906eb4105cccfb3bcd90be7f40d2.tar.gz linux-bafb0762cb6a906eb4105cccfb3bcd90be7f40d2.tar.bz2 linux-bafb0762cb6a906eb4105cccfb3bcd90be7f40d2.zip |
Merge tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big char/misc driver update for 4.14-rc1.
Lots of different stuff in here, it's been an active development cycle
for some reason. Highlights are:
- updated binder driver, this brings binder up to date with what
shipped in the Android O release, plus some more changes that
happened since then that are in the Android development trees.
- coresight updates and fixes
- mux driver file renames to be a bit "nicer"
- intel_th driver updates
- normal set of hyper-v updates and changes
- small fpga subsystem and driver updates
- lots of const code changes all over the driver trees
- extcon driver updates
- fmc driver subsystem upadates
- w1 subsystem minor reworks and new features and drivers added
- spmi driver updates
Plus a smattering of other minor driver updates and fixes.
All of these have been in linux-next with no reported issues for a
while"
* tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (244 commits)
ANDROID: binder: don't queue async transactions to thread.
ANDROID: binder: don't enqueue death notifications to thread todo.
ANDROID: binder: Don't BUG_ON(!spin_is_locked()).
ANDROID: binder: Add BINDER_GET_NODE_DEBUG_INFO ioctl
ANDROID: binder: push new transactions to waiting threads.
ANDROID: binder: remove proc waitqueue
android: binder: Add page usage in binder stats
android: binder: fixup crash introduced by moving buffer hdr
drivers: w1: add hwmon temp support for w1_therm
drivers: w1: refactor w1_slave_show to make the temp reading functionality separate
drivers: w1: add hwmon support structures
eeprom: idt_89hpesx: Support both ACPI and OF probing
mcb: Fix an error handling path in 'chameleon_parse_cells()'
MCB: add support for SC31 to mcb-lpc
mux: make device_type const
char: virtio: constify attribute_group structures.
Documentation/ABI: document the nvmem sysfs files
lkdtm: fix spelling mistake: "incremeted" -> "incremented"
perf: cs-etm: Fix ETMv4 CONFIGR entry in perf.data file
nvmem: include linux/err.h from header
...
Diffstat (limited to 'block')
-rw-r--r-- | block/genhd.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/block/genhd.c b/block/genhd.c index 7f520fa25d16..51c1d407d93c 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -242,6 +242,7 @@ EXPORT_SYMBOL_GPL(disk_map_sector_rcu); * Can be deleted altogether. Later. * */ +#define BLKDEV_MAJOR_HASH_SIZE 255 static struct blk_major_name { struct blk_major_name *next; int major; @@ -259,12 +260,11 @@ void blkdev_show(struct seq_file *seqf, off_t offset) { struct blk_major_name *dp; - if (offset < BLKDEV_MAJOR_HASH_SIZE) { - mutex_lock(&block_class_lock); - for (dp = major_names[offset]; dp; dp = dp->next) + mutex_lock(&block_class_lock); + for (dp = major_names[major_to_index(offset)]; dp; dp = dp->next) + if (dp->major == offset) seq_printf(seqf, "%3d %s\n", dp->major, dp->name); - mutex_unlock(&block_class_lock); - } + mutex_unlock(&block_class_lock); } #endif /* CONFIG_PROC_FS */ @@ -309,6 +309,14 @@ int register_blkdev(unsigned int major, const char *name) ret = major; } + if (major >= BLKDEV_MAJOR_MAX) { + pr_err("register_blkdev: major requested (%d) is greater than the maximum (%d) for %s\n", + major, BLKDEV_MAJOR_MAX, name); + + ret = -EINVAL; + goto out; + } + p = kmalloc(sizeof(struct blk_major_name), GFP_KERNEL); if (p == NULL) { ret = -ENOMEM; |