From: Patrick Farrell Date: Mon, 23 Jun 2014 01:32:20 +0000 (-0400) Subject: staging/lustre/vvp: release mmap_sem in error case X-Git-Tag: v3.17-rc1~123^2~1347 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=09516500cb7555e83aceb9316ce69b0baf6ad1eb;p=karo-tx-linux.git staging/lustre/vvp: release mmap_sem in error case The mmap_sem is downed in vvp_mmap_locks, but in case of error from cl_io_lock_alloc_add, it is not upped. Credit to Paul Casella at Cray for finding this. Signed-off-by: Patrick Farrell Reviewed-on: http://review.whamcloud.com/10741 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5221 Reviewed-by: Andreas Dilger Signed-off-by: Oleg Drokin Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/lustre/lustre/llite/vvp_io.c b/drivers/staging/lustre/lustre/llite/vvp_io.c index 0e0b404cb5e6..04230edc1778 100644 --- a/drivers/staging/lustre/lustre/llite/vvp_io.c +++ b/drivers/staging/lustre/lustre/llite/vvp_io.c @@ -269,8 +269,10 @@ static int vvp_mmap_locks(const struct lu_env *env, descr->cld_mode, descr->cld_start, descr->cld_end); - if (result < 0) + if (result < 0) { + up_read(&mm->mmap_sem); return result; + } if (vma->vm_end - addr >= count) break;