diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-19 07:02:50 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-19 07:02:50 +0800 |
| commit | 61b6b7fbda1bcef6d3df6b789e6bb178ee83d3d8 (patch) | |
| tree | ed23eb87f0b1152118985f93a5f19ef66629bb9e /drivers/misc/cxl/file.c | |
| parent | 4c215fe8e288c87b34c3d5bc910c77af586859d2 (diff) | |
| parent | ec6f34e5b552fb0a52e6aae1a5afbbb1605cc6cc (diff) | |
Merge 3.19-rc5 into tty-next
We want those tty fixes in that release in this branch as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/cxl/file.c')
| -rw-r--r-- | drivers/misc/cxl/file.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c index e9f2f10dbb37..b15d8113877c 100644 --- a/drivers/misc/cxl/file.c +++ b/drivers/misc/cxl/file.c @@ -140,18 +140,20 @@ static long afu_ioctl_start_work(struct cxl_context *ctx, pr_devel("%s: pe: %i\n", __func__, ctx->pe); - mutex_lock(&ctx->status_mutex); - if (ctx->status != OPENED) { - rc = -EIO; - goto out; - } - + /* Do this outside the status_mutex to avoid a circular dependency with + * the locking in cxl_mmap_fault() */ if (copy_from_user(&work, uwork, sizeof(struct cxl_ioctl_start_work))) { rc = -EFAULT; goto out; } + mutex_lock(&ctx->status_mutex); + if (ctx->status != OPENED) { + rc = -EIO; + goto out; + } + /* * if any of the reserved fields are set or any of the unused * flags are set it's invalid |