diff options
| author | Bernd Schubert <bernd.schubert@itwm.fraunhofer.de> | 2013-09-23 14:47:32 +0200 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-10-25 09:58:12 +0100 |
| commit | af73623f5f10eb3832c87a169b28f7df040a875b (patch) | |
| tree | 0a7d02f6129de16d39abf6100a291b5b149ffa95 /drivers | |
| parent | 51d648af5892219cbe97305efb300d3e56746591 (diff) | |
[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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/scsi/sd.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 5693f6d7edd..ab96b793f90 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -2639,13 +2639,16 @@ static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) struct scsi_device *sdev = sdkp->device; if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { + /* too large values might cause issues with arcmsr */ + int vpd_buf_len = 64; + sdev->no_report_opcodes = 1; /* Disable WRITE SAME if REPORT SUPPORTED OPERATION * CODES is unsupported and the device has an ATA * Information VPD page (SAT). */ - if (!scsi_get_vpd_page(sdev, 0x89, buffer, SD_BUF_SIZE)) + if (!scsi_get_vpd_page(sdev, 0x89, buffer, vpd_buf_len)) sdev->no_write_same = 1; } |