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[SCSI] megaraid_mbox: fix Dell CERC firmware problem 

Newer Dell CERC firmware (>= 6.62) implement a random deletion handling
compatible with the legacy megaraid driver.  The legacy handling shifted
the target ID by 0x80 only for I/O commands (READ/WRITE/etc), whereas
megaraid_mbox shifts the target ID always if random deletion is supported.
The resulted in megaraid_mbox sending an INQUIRY to the wrong channel, and
not finding any devices, obviously.

So we disable the random deletion support if the offending firmware is
found.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=6695

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: "Yang, Bo" <Bo.Yang@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Hannes Reinecke 2008-04-18 13:57:20 -07:00 committed by James Bottomley
parent 064922a805
commit 69cd39e946
2 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/scsi/megaraid/megaraid_mbox.c
View File

@ -3168,6 +3168,23 @@ megaraid_mbox_support_random_del(adapter_t *adapter)
uint8_t raw_mbox[sizeof(mbox_t)];
int rval;
/*
* Newer firmware on Dell CERC expect a different
* random deletion handling, so disable it.
*/
if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
(adapter->fw_version[0] > '6' ||
(adapter->fw_version[0] == '6' &&
adapter->fw_version[2] > '6') ||
(adapter->fw_version[0] == '6'
&& adapter->fw_version[2] == '6'
&& adapter->fw_version[3] > '1'))) {
con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
return 0;
}
mbox = (mbox_t *)raw_mbox;

1
drivers/scsi/megaraid/megaraid_mbox.h
View File

@ -88,6 +88,7 @@
#define PCI_SUBSYS_ID_PERC3_QC 0x0471
#define PCI_SUBSYS_ID_PERC3_DC 0x0493
#define PCI_SUBSYS_ID_PERC3_SC 0x0475
#define PCI_SUBSYS_ID_CERC_ATA100_4CH 0x0511
#define MBOX_MAX_SCSI_CMDS 128 // number of cmds reserved for kernel