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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>
This commit is contained in:
Raghava Aditya Renukunta 2017-12-26 20:34:44 -08:00 committed by Martin K. Petersen
parent 6f44a22b2c
commit 3395614e48
3 changed files with 4 additions and 0 deletions
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1
drivers/scsi/aacraid/aacraid.h
View File

@ -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

2
drivers/scsi/aacraid/commsup.c
View File

@ -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:

1
drivers/scsi/aacraid/linit.c
View File

@ -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.
*/