Commit 355dfa1b authored by James Bottomley's avatar James Bottomley Committed by James Bottomley

[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: default avatarJames Bottomley <James.Bottomley@SteelEye.com>
parent a6123f14
......@@ -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;
......@@ -719,18 +711,6 @@ 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
*/
......
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