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authorRaghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>2017-12-26 20:34:44 -0800
committerMartin K. Petersen <martin.petersen@oracle.com>2018-01-03 23:26:43 -0500
commit3395614e48e26c6b05f87662ef354bca38999d2a (patch)
tree6ecab574a9c3bf09368a3299d9e976615b203603 /drivers/scsi/aacraid
parent6f44a22b2c96acd018b407ee28407e1730370169 (diff)
downloadlinux-3395614e48e26c6b05f87662ef354bca38999d2a.tar.bz2
scsi: aacraid: Block concurrent hotplug event handling
Currently driver will attempt to process hotplug events concurrently based on the FW interrupt. Protect safw update function with a scan mutex. Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/aacraid')
-rw-r--r--drivers/scsi/aacraid/aacraid.h1
-rw-r--r--drivers/scsi/aacraid/commsup.c2
-rw-r--r--drivers/scsi/aacraid/linit.c1
3 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index a8fe1e1272c1..c70c998743ac 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -1565,6 +1565,7 @@ struct aac_dev
spinlock_t fib_lock;
struct mutex ioctl_mutex;
+ struct mutex scan_mutex;
struct aac_queue_block *queues;
/*
* The user API will use an IOCTL to register itself to receive
diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
index 34155b1aa83e..491e6338c483 100644
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -1997,7 +1997,9 @@ static void aac_handle_sa_aif(struct aac_dev *dev, struct fib *fibptr)
case SA_AIF_LDEV_CHANGE:
case SA_AIF_BPCFG_CHANGE:
+ mutex_lock(&dev->scan_mutex);
aac_update_safw_host_devices(dev, AAC_RESCAN);
+ mutex_unlock(&dev->scan_mutex);
break;
case SA_AIF_BPSTAT_CHANGE:
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index b2273e3cba62..2c862cd26a21 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -1683,6 +1683,7 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
spin_lock_init(&aac->fib_lock);
mutex_init(&aac->ioctl_mutex);
+ mutex_init(&aac->scan_mutex);
/*
* Map in the registers from the adapter.
*/