From: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Date: Mon, 23 Sep 2013 12:47:32 +0000 (+0200)
Subject: [SCSI] sd: Reduce buffer size for vpd request
X-Git-Tag: v3.13-rc1~99^2~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af73623f5f10eb3832c87a169b28f7df040a875b;p=pandora-kernel.git

[SCSI] sd: Reduce buffer size for vpd request

Somehow older areca firmware versions have issues with
scsi_get_vpd_page() and a large buffer, the firmware
seems to crash and the scsi error-handler will start endless
recovery retries.
Limiting the buf-size to 64-bytes fixes this issue with older
firmware versions (<1.49 for my controller).

Fixes a regression with areca controllers and older firmware versions
introduced by commit: 66c28f97120e8a621afd5aa7a31c4b85c547d33d

Reported-by: Nix <nix@esperi.org.uk>
Tested-by: Nix <nix@esperi.org.uk>
Signed-off-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de>
Cc: stable@vger.kernel.org # delay inclusion for 2 months for testing
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

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