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SCSI fixes on 20220429

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One fix for an endless error loop with the target driver affecting tapes.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fix from James Bottomley:
 "One fix for an endless error loop with the target driver affecting
  tapes"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: target: pscsi: Set SCF_TREAT_READ_AS_NORMAL flag only if there is valid data
This commit is contained in:
Linus Torvalds 2022-04-30 09:47:59 -07:00
commit e9512f3668
1 changed files with 5 additions and 5 deletions
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10
drivers/target/target_core_pscsi.c
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@ -588,7 +588,7 @@ static void pscsi_destroy_device(struct se_device *dev)
}
static void pscsi_complete_cmd(struct se_cmd *cmd, u8 scsi_status,
unsigned char *req_sense)
unsigned char *req_sense, int valid_data)
{
struct pscsi_dev_virt *pdv = PSCSI_DEV(cmd->se_dev);
struct scsi_device *sd = pdv->pdv_sd;
@ -681,7 +681,7 @@ after_mode_select:
* back despite framework assumption that a
* check condition means there is no data
*/
if (sd->type == TYPE_TAPE &&
if (sd->type == TYPE_TAPE && valid_data &&
cmd->data_direction == DMA_FROM_DEVICE) {
/*
* is sense data valid, fixed format,
@ -1032,6 +1032,7 @@ static void pscsi_req_done(struct request *req, blk_status_t status)
struct se_cmd *cmd = req->end_io_data;
struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(req);
enum sam_status scsi_status = scmd->result & 0xff;
int valid_data = cmd->data_length - scmd->resid_len;
u8 *cdb = cmd->priv;
if (scsi_status != SAM_STAT_GOOD) {
@ -1039,12 +1040,11 @@ static void pscsi_req_done(struct request *req, blk_status_t status)
" 0x%02x Result: 0x%08x\n", cmd, cdb[0], scmd->result);
}
pscsi_complete_cmd(cmd, scsi_status, scmd->sense_buffer);
pscsi_complete_cmd(cmd, scsi_status, scmd->sense_buffer, valid_data);
switch (host_byte(scmd->result)) {
case DID_OK:
target_complete_cmd_with_length(cmd, scsi_status,
cmd->data_length - scmd->resid_len);
target_complete_cmd_with_length(cmd, scsi_status, valid_data);
break;
default:
pr_debug("PSCSI Host Byte exception at cmd: %p CDB:"