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authorDavid S. Miller <davem@sunset.davemloft.net>2007-04-02 17:21:55 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-02 17:26:22 -0400
commit8cc574a3c5cea70229f243a6b57fd69e60491d82 (patch)
treeece3e6847a0b60f15594e90f1d567e9df6eefa5d /drivers/scsi/scsi_error.c
parentd80f0a4beb15d817bfbb18a29e5ffc1d9dc353ea (diff)
[SCSI]: Fix scsi_send_eh_cmnd scatterlist handling
This fixes a regression caused by commit: 2dc611de5a3fd955cd0298c50691d4c05046db97 The sense buffer code in scsi_send_eh_cmnd was changed to use alloc_page() and a scatter list, but the sense data copy was not updated to match so what we actually get in the sense buffer is total grabage starting with the kernel address of the struct page we got. Basically the stack frame of scsi_send_eh_cmd() is what ends up in the sense buffer. Depending upon how pointers look on a given platform, you can end up getting sr_ioctl.c errors when you mount a cdrom. If the CDROM gives a check condition for GPCMD_GET_CONFIGURATION issued by drivers/cdrom/cdrom.c:cdrom_mmc_profile(), sr_ioctl will spit out this error message in sr_do_ioctl() with the way pointers are on sparc64: default: printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name); __scsi_print_command(cgc->cmd); scsi_print_sense_hdr("sr", &sshdr); err = -EIO; This is the error Tom Callaway reported in: http://marc.info/?l=linux-sparc&m=117407453208101&w=2 Anyways, fix this by using page_address(sgl.page) which is OK because we know this is low-mem due to GFP_ATOMIC. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/scsi/scsi_error.c')
-rw-r--r--drivers/scsi/scsi_error.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index b8edcf5b5451..918bb6019540 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -716,7 +716,7 @@ static int scsi_send_eh_cmnd(struct scsi_cmnd *scmd, unsigned char *cmnd,
716 */ 716 */
717 if (copy_sense) { 717 if (copy_sense) {
718 if (!SCSI_SENSE_VALID(scmd)) { 718 if (!SCSI_SENSE_VALID(scmd)) {
719 memcpy(scmd->sense_buffer, scmd->request_buffer, 719 memcpy(scmd->sense_buffer, page_address(sgl.page),
720 sizeof(scmd->sense_buffer)); 720 sizeof(scmd->sense_buffer));
721 } 721 }
722 __free_page(sgl.page); 722 __free_page(sgl.page);