After some investigation, there turned out only to be one, so this is
the final bug fix I have in SCSI.
It's in
master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6.git
but since there's only one, I also attach it below.
James
----
>From 6e3b2bbb197eb12b2bef35bcf2ac3bd6a5facab2 Mon Sep 17 00:00:00 2001
From: James Bottomley <James.Bottomley@xxxxxxxxxxxx>
Date: Fri, 6 Apr 2007 11:14:56 -0500
Subject: [SCSI] 3w-xxxx: fix oops caused by incorrect REQUEST_SENSE handling
3w-xxxx emulates a REQUEST_SENSE response by simply returning nothing.
Unfortunately, it's assuming that the REQUEST_SENSE command is
implemented with use_sg == 0, which is no longer the case. The oops
occurs because it's clearing the scatterlist in request_buffer instead
of the memory region.
This is fixed by using tw_transfer_internal() to transfer correctly to
the scatterlist.
Acked-by: adam radford <aradford@xxxxxxxxx>
Signed-off-by: James Bottomley <James.Bottomley@xxxxxxxxxxxx>
---
drivers/scsi/3w-xxxx.c | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/scsi/3w-xxxx.c b/drivers/scsi/3w-xxxx.c
index bf5d63e..656bdb1 100644
--- a/drivers/scsi/3w-xxxx.c
+++ b/drivers/scsi/3w-xxxx.c
@@ -1864,10 +1864,17 @@ static int tw_scsiop_read_write(TW_Device_Extension *tw_dev, int request_id)
/* This function will handle the request sense scsi command */
static int tw_scsiop_request_sense(TW_Device_Extension *tw_dev, int request_id)
{
+ char request_buffer[18];
+
dprintk(KERN_NOTICE "3w-xxxx: tw_scsiop_request_sense()\n");
- /* For now we just zero the request buffer */
- memset(tw_dev->srb[request_id]->request_buffer, 0, tw_dev->srb[request_id]->request_bufflen);
+ memset(request_buffer, 0, sizeof(request_buffer));
+ request_buffer[0] = 0x70; /* Immediate fixed format */
+ request_buffer[7] = 10; /* minimum size per SPC: 18 bytes */
+ /* leave all other fields zero, giving effectively NO_SENSE return */
+ tw_transfer_internal(tw_dev, request_id, request_buffer,
+ sizeof(request_buffer));
+
tw_dev->state[request_id] = TW_S_COMPLETED;
tw_state_request_finish(tw_dev, request_id);
--
1.5.0.6
-
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