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authornagalakshmi.nandigama@lsi.com <nagalakshmi.nandigama@lsi.com>2011-12-01 07:52:56 +0530
committerJames Bottomley <JBottomley@Parallels.com>2011-12-15 10:57:39 +0400
commit30c43282f3d347f47f9e05199d2b14f56f3f2837 (patch)
treeb656facf9d6bf00b62fe0f189ad34977aa91c143 /drivers/scsi/mpt2sas
parenta6affbd5ccbb45e03168996bae4a4d0abb780874 (diff)
downloadop-kernel-dev-30c43282f3d347f47f9e05199d2b14f56f3f2837.zip
op-kernel-dev-30c43282f3d347f47f9e05199d2b14f56f3f2837.tar.gz
[SCSI] mpt2sas: Release spinlock for the raid device list before blocking it
Added code to release the spinlock that is used to protect the raid device list before calling a function that can block. The blocking was causing a reschedule, and subsequently it is tried to acquire the same lock, resulting in a panic (NMI Watchdog detecting a CPU lockup). Signed-off-by: Nagalakshmi Nandigama <nagalakshmi.nandigama@lsi.com> Cc: stable@kernel.org Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi/mpt2sas')
-rw-r--r--drivers/scsi/mpt2sas/mpt2sas_scsih.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index 0611720..8e2e997 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -6749,6 +6749,7 @@ _scsih_mark_responding_raid_device(struct MPT2SAS_ADAPTER *ioc, u64 wwid,
} else
sas_target_priv_data = NULL;
raid_device->responding = 1;
+ spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
starget_printk(KERN_INFO, raid_device->starget,
"handle(0x%04x), wwid(0x%016llx)\n", handle,
(unsigned long long)raid_device->wwid);
@@ -6759,16 +6760,16 @@ _scsih_mark_responding_raid_device(struct MPT2SAS_ADAPTER *ioc, u64 wwid,
*/
_scsih_init_warpdrive_properties(ioc, raid_device);
if (raid_device->handle == handle)
- goto out;
+ return;
printk(KERN_INFO "\thandle changed from(0x%04x)!!!\n",
raid_device->handle);
raid_device->handle = handle;
if (sas_target_priv_data)
sas_target_priv_data->handle = handle;
- goto out;
+ return;
}
}
- out:
+
spin_unlock_irqrestore(&ioc->raid_device_lock, flags);
}
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