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scsi: aacraid: Fix for excessive prints on EEH

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This issue showed up on a kdump debug(single CPU on powerkvm), when EEH
errors rendered the adapter unusable. The driver correctly detected the
issue and attempted to restart the controller, in doing so the driver
attempted to read the status registers of the controller. This triggered
additional eeh errors which continued for a good 6 minutes.

Fixed by returning without waiting when EEH error is reported.

Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Reviewed-by: David Carroll <David.Carroll@microsemi.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Raghava Aditya Renukunta 2017-02-16 12:51:12 -08:00 committed by Martin K. Petersen
parent f3ef4a74dc
commit 16ae9dd35d
1 changed files with 38 additions and 1 deletions
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39
drivers/scsi/aacraid/commsup.c
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@ -461,6 +461,35 @@ int aac_queue_get(struct aac_dev * dev, u32 * index, u32 qid, struct hw_fib * hw
return 0;
}
#ifdef CONFIG_EEH
static inline int aac_check_eeh_failure(struct aac_dev *dev)
{
/* Check for an EEH failure for the given
* device node. Function eeh_dev_check_failure()
* returns 0 if there has not been an EEH error
* otherwise returns a non-zero value.
*
* Need to be called before any PCI operation,
* i.e.,before aac_adapter_check_health()
*/
struct eeh_dev *edev = pci_dev_to_eeh_dev(dev->pdev);
if (eeh_dev_check_failure(edev)) {
/* The EEH mechanisms will handle this
* error and reset the device if
* necessary.
*/
return 1;
}
return 0;
}
#else
static inline int aac_check_eeh_failure(struct aac_dev *dev)
{
return 0;
}
#endif
/*
* Define the highest level of host to adapter communication routines.
* These routines will support host to adapter FS commuication. These
@ -496,7 +525,6 @@ int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
unsigned long mflags = 0;
unsigned long sflags = 0;
if (!(hw_fib->header.XferState & cpu_to_le32(HostOwned)))
return -EBUSY;
/*
@ -662,6 +690,10 @@ int aac_fib_send(u16 command, struct fib *fibptr, unsigned long size,
}
return -ETIMEDOUT;
}
if (aac_check_eeh_failure(dev))
return -EFAULT;
if ((blink = aac_adapter_check_health(dev)) > 0) {
if (wait == -1) {
printk(KERN_ERR "aacraid: aac_fib_send: adapter blinkLED 0x%x.\n"
@ -755,7 +787,12 @@ int aac_hba_send(u8 command, struct fib *fibptr, fib_callback callback,
FIB_COUNTER_INCREMENT(aac_config.NativeSent);
if (wait) {
spin_unlock_irqrestore(&fibptr->event_lock, flags);
if (aac_check_eeh_failure(dev))
return -EFAULT;
/* Only set for first known interruptable command */
if (down_interruptible(&fibptr->event_wait)) {
fibptr->done = 2;