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scsi: aacraid: Fix hang in kdump 

commit c5313ae8e4 upstream.

Driver attempts to perform a device scan and device add after coming out
of reset. At times when the kdump kernel loads and it tries to perform
eh recovery, the device scan hangs since its commands are blocked because
of the eh recovery. This should have shown up in normal eh recovery path
(Should have been obvious)

Remove the code that performs scanning.I can live without the rescanning
support in the stable kernels but a hanging kdump/eh recovery needs to be
fixed.

Fixes: a2d0321dd5 (scsi: aacraid: Reload offlined drives after controller reset)
Reported-by: Douglas Miller <dougmill@linux.vnet.ibm.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Fixes: a2d0321dd5 (scsi: aacraid: Reload offlined drives after controller reset)
Signed-off-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Raghava Aditya Renukunta 2017-12-26 20:34:24 -08:00 committed by Greg Kroah-Hartman
parent 791274e773
commit d7fec01990
2 changed files with 1 additions and 9 deletions
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1
drivers/scsi/aacraid/aachba.c
View File

@ -918,7 +918,6 @@ static void setinqstr(struct aac_dev *dev, void *data, int tindex)
char *cname = kmemdup(sup_adap_info->adapter_type_text,
sizeof(sup_adap_info->adapter_type_text),
GFP_ATOMIC);
if (!cname)
return;

9
drivers/scsi/aacraid/commsup.c
View File

@ -1672,14 +1672,7 @@ static int _aac_reset_adapter(struct aac_dev *aac, int forced, u8 reset_type)
out:
aac->in_reset = 0;
scsi_unblock_requests(host);
/*
* Issue bus rescan to catch any configuration that might have
* occurred
*/
if (!retval) {
dev_info(&aac->pdev->dev, "Issuing bus rescan\n");
scsi_scan_host(host);
}
if (jafo) {
spin_lock_irq(host->host_lock);
}