[PATCH v2 22/35] scsi: Have scsi-ml retry read_capacity_16 errors

Mike Christie
2022-09-29T02:55:29Z

This has read_capacity_16 have scsi-ml retry errors instead of driving
them itself.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
drivers/scsi/sd.c | 82 +++++++++++++++++++++++++----------------------
1 file changed, 43 insertions(+), 39 deletions(-)

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 37eafa968116..a35c089c3097 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2283,55 +2283,59 @@ static int read_capacity_16(struct scsi_disk *sdkp, struct scsi_device *sdp,
struct scsi_sense_hdr sshdr;
int sense_valid = 0;
int the_result;
- int retries = 3, reset_retries = READ_CAPACITY_RETRIES_ON_RESET;
unsigned int alignment;
unsigned long long lba;
unsigned sector_size;
+ struct scsi_failure failures[] = {
+ {
+ .sense = UNIT_ATTENTION,
+ .asc = 0x29,
+ .ascq = 0,
+ /* Device reset might occur several times */
+ .allowed = READ_CAPACITY_RETRIES_ON_RESET,
+ .result = SAM_STAT_CHECK_CONDITION,
+ },
+ {
+ .result = SCMD_FAILURE_ANY,
+ .allowed = 3,
+ },
+ {},
+ };

if (sdp->no_read_capacity_16)
return -EINVAL;

- do {
- memset(cmd, 0, 16);
- cmd[0] = SERVICE_ACTION_IN_16;
- cmd[1] = SAI_READ_CAPACITY_16;
- cmd[13] = RC16_LEN;
- memset(buffer, 0, RC16_LEN);
+ memset(cmd, 0, 16);
+ cmd[0] = SERVICE_ACTION_IN_16;
+ cmd[1] = SAI_READ_CAPACITY_16;
+ cmd[13] = RC16_LEN;
+ memset(buffer, 0, RC16_LEN);

- the_result = scsi_exec_req(((struct scsi_exec_args) {
- .sdev = sdp,
- .cmd = cmd,
- .data_dir = DMA_FROM_DEVICE,
- .buf = buffer,
- .buf_len = RC16_LEN,
- .sshdr = &sshdr,
- .timeout = SD_TIMEOUT,
- .retries = sdkp->max_retries }));
-
- if (media_not_present(sdkp, &sshdr))
- return -ENODEV;
+ the_result = scsi_exec_req(((struct scsi_exec_args) {
+ .sdev = sdp,
+ .cmd = cmd,
+ .data_dir = DMA_FROM_DEVICE,
+ .buf = buffer,
+ .buf_len = RC16_LEN,
+ .sshdr = &sshdr,
+ .timeout = SD_TIMEOUT,
+ .retries = sdkp->max_retries,
+ .failures = failures }));

- if (the_result > 0) {
- sense_valid = scsi_sense_valid(&sshdr);
- if (sense_valid &&
- sshdr.sense_key == ILLEGAL_REQUEST &&
- (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
- sshdr.ascq == 0x00)
- /* Invalid Command Operation Code or
- * Invalid Field in CDB, just retry
- * silently with RC10 */
- return -EINVAL;
- if (sense_valid &&
- sshdr.sense_key == UNIT_ATTENTION &&
- sshdr.asc == 0x29 && sshdr.ascq == 0x00)
- /* Device reset might occur several times,
- * give it one more chance */
- if (--reset_retries > 0)
- continue;
- }
- retries--;
+ if (media_not_present(sdkp, &sshdr))
+ return -ENODEV;

- } while (the_result && retries);
+ if (the_result > 0) {
+ sense_valid = scsi_sense_valid(&sshdr);
+ if (sense_valid && sshdr.sense_key == ILLEGAL_REQUEST &&
+ (sshdr.asc == 0x20 || sshdr.asc == 0x24) &&
+ sshdr.ascq == 0x00)
+ /*
+ * Invalid Command Operation Code or Invalid Field in
+ * CDB, just retry silently with RC10
+ */
+ return -EINVAL;
+ }

if (the_result) {
sd_print_result(sdkp, "Read Capacity(16) failed", the_result);
--
2.25.1