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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-04-09 00:27:16 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-04-09 00:27:16 +0100 |
| commit | 73830857bca6f6c9dbd48e906daea50bea42d676 (patch) | |
| tree | 1d68ff2f2da69fea4ba3fe720bbfc32507a5f7e3 | |
| parent | af7e466a1acededbc10beaba9eec8531d561c566 (diff) | |
| download | kernel-crypto-73830857bca6f6c9dbd48e906daea50bea42d676.tar.gz kernel-crypto-73830857bca6f6c9dbd48e906daea50bea42d676.tar.xz kernel-crypto-73830857bca6f6c9dbd48e906daea50bea42d676.zip | |
dm kcopyd: prepare for callback race fix
Use a variable in segment_complete() to point to the dm_kcopyd_client
struct and only release job->pages in run_complete_job() if any are
defined. These changes are needed by the next patch.
Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
| -rw-r--r-- | drivers/md/dm-kcopyd.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c index 0a225da2127..9d379070918 100644 --- a/drivers/md/dm-kcopyd.c +++ b/drivers/md/dm-kcopyd.c @@ -297,7 +297,8 @@ static int run_complete_job(struct kcopyd_job *job) dm_kcopyd_notify_fn fn = job->fn; struct dm_kcopyd_client *kc = job->kc; - kcopyd_put_pages(kc, job->pages); + if (job->pages) + kcopyd_put_pages(kc, job->pages); mempool_free(job, kc->job_pool); fn(read_err, write_err, context); @@ -461,6 +462,7 @@ static void segment_complete(int read_err, unsigned long write_err, sector_t progress = 0; sector_t count = 0; struct kcopyd_job *job = (struct kcopyd_job *) context; + struct dm_kcopyd_client *kc = job->kc; mutex_lock(&job->lock); @@ -490,7 +492,7 @@ static void segment_complete(int read_err, unsigned long write_err, if (count) { int i; - struct kcopyd_job *sub_job = mempool_alloc(job->kc->job_pool, + struct kcopyd_job *sub_job = mempool_alloc(kc->job_pool, GFP_NOIO); *sub_job = *job; |