diff options
| author | James Bottomley <James.Bottomley@steeleye.com> | 2007-05-22 14:43:14 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-05-24 09:10:02 -0500 |
| commit | 355dfa1bc8026d185678fed4e409719a595b2d39 (patch) | |
| tree | f3d2c19268bf879565509730e611d4d389d78fbc | |
| parent | a6123f142924a5e21f6d48e6e3c67d9060726caa (diff) | |
[SCSI] scsi_error: send the sense buffer down without copying
Now that the block submission path correctly bounces, we can simply
use the command sense_buffer to send to retrieve sense information and
junk the unnecessary page allocation.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| -rw-r--r-- | drivers/scsi/scsi_error.c | 26 |
1 files changed, 3 insertions, 23 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index e8350c562d2..9adb64ac054 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -18,12 +18,12 @@ #include <linux/sched.h> #include <linux/timer.h> #include <linux/string.h> -#include <linux/slab.h> #include <linux/kernel.h> #include <linux/kthread.h> #include <linux/interrupt.h> #include <linux/blkdev.h> #include <linux/delay.h> +#include <linux/scatterlist.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> @@ -640,16 +640,8 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, unsigned char *cmnd, memcpy(scmd->cmnd, cmnd, cmnd_size); if (copy_sense) { - gfp_t gfp_mask = GFP_ATOMIC; - - if (shost->hostt->unchecked_isa_dma) - gfp_mask |= __GFP_DMA; - - sgl.page = alloc_page(gfp_mask); - if (!sgl.page) - return FAILED; - sgl.offset = 0; - sgl.length = 252; + sg_init_one(&sgl, scmd->sense_buffer, + sizeof(scmd->sense_buffer)); scmd->sc_data_direction = DMA_FROM_DEVICE; scmd->request_bufflen = sgl.length; @@ -720,18 +712,6 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, unsigned char *cmnd, /* - * Last chance to have valid sense data. - */ - if (copy_sense) { - if (!SCSI_SENSE_VALID(scmd)) { - memcpy(scmd->sense_buffer, page_address(sgl.page), - sizeof(scmd->sense_buffer)); - } - __free_page(sgl.page); - } - - - /* * Restore original data */ scmd->request_buffer = old_buffer; |