summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/libsas/sas_init.c
diff options
context:
space:
mode:
authorDan Williams <dan.j.williams@intel.com>2012-03-09 11:00:06 -0800
committerJames Bottomley <JBottomley@Parallels.com>2012-04-23 12:03:39 +0100
commit22b9153faa2263aa89625de25e71c7d44c8dbd16 (patch)
tree1157d64a9c63c5b7b48b4a5b3610965d8d4c9624 /drivers/scsi/libsas/sas_init.c
parentf8fc75dc576eac0c996e4a792a4701819d999260 (diff)
[SCSI] libsas: introduce sas_work to fix sas_drain_work vs sas_queue_work
When requeuing work to a draining workqueue the last work instance may not be idle, so sas_queue_work() must not touch work->entry. Introduce sas_work with a drain_node list_head to have a private list for collecting work deferred due to drain collision. Fixes reports like: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff810410d4>] process_one_work+0x2e/0x338 Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/libsas/sas_init.c')
-rw-r--r--drivers/scsi/libsas/sas_init.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c
index 120bff64be3..10cb5ae3097 100644
--- a/drivers/scsi/libsas/sas_init.c
+++ b/drivers/scsi/libsas/sas_init.c
@@ -94,8 +94,7 @@ void sas_hash_addr(u8 *hashed, const u8 *sas_addr)
void sas_hae_reset(struct work_struct *work)
{
- struct sas_ha_event *ev =
- container_of(work, struct sas_ha_event, work);
+ struct sas_ha_event *ev = to_sas_ha_event(work);
struct sas_ha_struct *ha = ev->ha;
clear_bit(HAE_RESET, &ha->pending);
@@ -369,14 +368,14 @@ static void sas_phy_release(struct sas_phy *phy)
static void phy_reset_work(struct work_struct *work)
{
- struct sas_phy_data *d = container_of(work, typeof(*d), reset_work);
+ struct sas_phy_data *d = container_of(work, typeof(*d), reset_work.work);
d->reset_result = transport_sas_phy_reset(d->phy, d->hard_reset);
}
static void phy_enable_work(struct work_struct *work)
{
- struct sas_phy_data *d = container_of(work, typeof(*d), enable_work);
+ struct sas_phy_data *d = container_of(work, typeof(*d), enable_work.work);
d->enable_result = sas_phy_enable(d->phy, d->enable);
}
@@ -389,8 +388,8 @@ static int sas_phy_setup(struct sas_phy *phy)
return -ENOMEM;
mutex_init(&d->event_lock);
- INIT_WORK(&d->reset_work, phy_reset_work);
- INIT_WORK(&d->enable_work, phy_enable_work);
+ INIT_SAS_WORK(&d->reset_work, phy_reset_work);
+ INIT_SAS_WORK(&d->enable_work, phy_enable_work);
d->phy = phy;
phy->hostdata = d;