Guilherme G. Piccoli d1b490939d scsi: aacraid: Add a small delay after IOP reset ... Commit 0e9973ed33 ("scsi: aacraid: Add periodic checks to see IOP reset status") changed the way driver checks if a reset succeeded. Now, after an IOP reset, aacraid immediately start polling a register to verify the reset is complete. This behavior cause regressions on the reset path in PowerPC (at least). Since the delay after the IOP reset was removed by the aforementioned patch, the fact driver just starts to read a register instantly after the reset was issued (by writing in another register) "corrupts" the reset procedure, which ends up failing all the time. The issue highly impacted kdump on PowerPC, since on kdump path we proactively issue a reset in adapter (through the reset_devices kernel parameter). This patch (re-)adds a delay right after IOP reset is issued. Empirically we measured that 3 seconds is enough, but for safety reasons we delay for 5s (and since it was 30s before, 5s is still a small amount). For reference, without this patch we observe the following messages on kdump kernel boot process: [ 76.294] aacraid 0003:01:00.0: IOP reset failed [ 76.294] aacraid 0003:01:00.0: ARC Reset attempt failed [ 86.524] aacraid 0003:01:00.0: adapter kernel panic'd ff. [ 86.524] aacraid 0003:01:00.0: Controller reset type is 3 [ 86.524] aacraid 0003:01:00.0: Issuing IOP reset [146.534] aacraid 0003:01:00.0: IOP reset failed [146.534] aacraid 0003:01:00.0: ARC Reset attempt failed Fixes: 0e9973ed33 ("scsi: aacraid: Add periodic checks to see IOP reset status") Cc: stable@vger.kernel.org # v4.13+ Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Acked-by: Dave Carroll <david.carroll@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>		2017-09-27 21:42:14 -04:00
..
aachba.c	scsi: aacraid: Fix 2T+ drives on SmartIOC-2000	2017-09-15 15:49:43 -04:00
aacraid.h	scsi: aacraid: Fix 2T+ drives on SmartIOC-2000	2017-09-15 15:49:43 -04:00
commctrl.c	scsi: aacraid: Don't copy uninitialized stack memory to userspace	2017-06-26 15:01:03 -04:00
comminit.c	scsi: aacraid: fix indentation errors	2017-08-30 21:56:00 -04:00
commsup.c	scsi: aacraid: add fib flag to mark scsi command callback	2017-08-07 14:04:00 -04:00
dpcsup.c	scsi: aacraid: Update copyrights	2017-02-03 10:35:04 -05:00
linit.c	scsi: aacraid: error: testing array offset 'bus' after use	2017-09-15 21:46:07 -04:00
Makefile	[SCSI] aacraid: Add new code for PMC-Sierra's SRC based controller family	2011-03-23 11:36:58 -05:00
nark.c	scsi: aacraid: Update copyrights	2017-02-03 10:35:04 -05:00
rkt.c	scsi: aacraid: Update copyrights	2017-02-03 10:35:04 -05:00
rx.c	scsi: aacraid: pci_alloc_consistent() failures on ARM64	2017-04-26 18:28:06 -04:00
sa.c	scsi: aacraid: Update copyrights	2017-02-03 10:35:04 -05:00
src.c	scsi: aacraid: Add a small delay after IOP reset	2017-09-27 21:42:14 -04:00
TODO	[SCSI] aacraid: Newer adapter communication iterface support	2005-10-28 11:41:53 -05:00