linux-kernel - [PATCH 2/2] cciss: Initialize scsi host max

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Message-ID: <20120322180858.14453.67533.stgit@beardog.cce.hp.com>
Date:	Thu, 22 Mar 2012 13:08:58 -0500
From:	"Stephen M. Cameron" <scameron@...rdog.cce.hp.com>
To:	axboe@...nel.dk
Cc:	stephenmcameron@...il.com, akpm@...ux-foundation.org,
	mikem@...rdog.cce.hp.com, linux-kernel@...r.kernel.org,
	thenzl@...hat.com
Subject: [PATCH 2/2] cciss: Initialize scsi host max_sectors for tape drive
	support

From: Stephen M. Cameron <scameron@...rdog.cce.hp.com>

The default is too small (1024 blocks), use h->cciss_max_sectors (8192 blocks)
Without this change, if you try to set the block size of a tape drive above
512*1024, via "mt -f /dev/st0 setblk nnn" where nnn is greater than 524288,
it won't work right.

Signed-off-by: Stephen M. Cameron <scameron@...rdog.cce.hp.com>
Cc: stable@...r.kernel.org
---
 drivers/block/cciss_scsi.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/block/cciss_scsi.c b/drivers/block/cciss_scsi.c
index 1162f7b..acda773 100644
--- a/drivers/block/cciss_scsi.c
+++ b/drivers/block/cciss_scsi.c
@@ -866,6 +866,7 @@ cciss_scsi_detect(ctlr_info_t *h)
 	sh->can_queue = cciss_tape_cmds;
 	sh->sg_tablesize = h->maxsgentries;
 	sh->max_cmd_len = MAX_COMMAND_SIZE;
+	sh->max_sectors = h->cciss_max_sectors;
 
 	((struct cciss_scsi_adapter_data_t *) 
 		h->scsi_ctlr)->scsi_host = sh;

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