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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-01-16 05:32:17 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-23 18:37:37 +0100 |
| commit | de25deb18016f66dcdede165d07654559bb332bc (patch) | |
| tree | b566c2a369d3dce85507ab28ea20ffee020e0c06 /include | |
| parent | [SCSI] scsi.h: add macro for enclosure bit of inquiry data (diff) | |
| download | linux-de25deb18016f66dcdede165d07654559bb332bc.tar.xz linux-de25deb18016f66dcdede165d07654559bb332bc.zip | |
[SCSI] use dynamically allocated sense buffer
This removes static array sense_buffer in scsi_cmnd and uses
dynamically allocated sense_buffer (with GFP_DMA).
The reason for doing this is that some architectures need cacheline
aligned buffer for DMA:
http://lkml.org/lkml/2007/11/19/2
The problems are that scsi_eh_prep_cmnd puts scsi_cmnd::sense_buffer
to sglist and some LLDs directly DMA to scsi_cmnd::sense_buffer. It's
necessary to DMA to scsi_cmnd::sense_buffer safely. This patch solves
these issues.
__scsi_get_command allocates sense_buffer via kmem_cache_alloc and
attaches it to a scsi_cmnd so everything just work as before.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/scsi/scsi_cmnd.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index 3f47e522a1ec..abd7479ff452 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -88,7 +88,7 @@ struct scsi_cmnd { working on */ #define SCSI_SENSE_BUFFERSIZE 96 - unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE]; + unsigned char *sense_buffer; /* obtained by REQUEST SENSE when * CHECK CONDITION is received on original * command (auto-sense) */ |