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| author | Brian King <brking@linux.vnet.ibm.com> | 2015-01-30 00:54:40 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2015-02-02 15:46:29 +0300 |
| commit | 3a9794d32984b67a6d8992226918618f0e51e5d5 (patch) | |
| tree | 63a25d8d1d8b851c97a0d24e334f1a317d07fb63 /drivers/scsi/device_handler/scsi_dh.c | |
| parent | 28072ad50ca7328bd99f9dba94ac27c723da0053 (diff) | |
| download | linux-3a9794d32984b67a6d8992226918618f0e51e5d5.tar.xz | |
sd: Fix max transfer length for 4k disks
The following patch fixes an issue observed with 4k sector disks
where the max_hw_sectors attribute was getting set too large in
sd_revalidate_disk. Since sdkp->max_xfer_blocks is in units
of SCSI logical blocks and queue_max_hw_sectors is in units of
512 byte blocks, on a 4k sector disk, every time we went through
sd_revalidate_disk, we were taking the current value of
queue_max_hw_sectors and increasing it by a factor of 8. Fix
this by only shifting sdkp->max_xfer_blocks.
Cc: stable@vger.kernel.org
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/device_handler/scsi_dh.c')
0 files changed, 0 insertions, 0 deletions