[PATCH v2 2/3] scsi: check for equality of result byte values

Johannes Thumshirn
2018-06-13T07:53:48Z

When evaluating a SCSI command's result using the field access macros,
check for equality of the fields and not if a specific bit is set.

This is a preparation patch, for reworking the results field in the
SCSI command.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>

---
Changes since v1:
- Reworked braces (Bart)
---
drivers/scsi/ch.c | 2 +-
drivers/scsi/dc395x.c | 3 +--
drivers/scsi/scsi.c | 2 +-
drivers/scsi/scsi_ioctl.c | 4 ++--
drivers/scsi/scsi_lib.c | 4 ++--
drivers/scsi/scsi_scan.c | 2 +-
drivers/scsi/scsi_transport_spi.c | 2 +-
drivers/scsi/sd.c | 14 +++++++-------
drivers/scsi/ufs/ufshcd.c | 2 +-
9 files changed, 17 insertions(+), 18 deletions(-)

diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index c535c52e72e5..1c5051b1c125 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -199,7 +199,7 @@ ch_do_scsi(scsi_changer *ch, unsigned char *cmd, int cmd_len,
buflength, &sshdr, timeout * HZ,
MAX_RETRIES, NULL);

- if (driver_byte(result) & DRIVER_SENSE) {
+ if (driver_byte(result) == DRIVER_SENSE) {
if (debug)
scsi_print_sense_hdr(ch->device, ch->name, &sshdr);
errno = ch_find_errno(&sshdr);
diff --git a/drivers/scsi/dc395x.c b/drivers/scsi/dc395x.c
index 60ef8df42b95..13d83c69e246 100644
--- a/drivers/scsi/dc395x.c
+++ b/drivers/scsi/dc395x.c
@@ -3474,8 +3474,7 @@ static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb,
/*if( srb->cmd->cmnd[0] == INQUIRY && */
/* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */
if ((cmd->result == (DID_OK << 16)
- || status_byte(cmd->result) &
- CHECK_CONDITION)) {
+ || status_byte(cmd->result) == CHECK_CONDITION)) {
if (!dcb->init_tcq_flag) {
add_dev(acb, dcb, ptr);
dcb->init_tcq_flag = 1;
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 4c60c260c5da..70ef3c39061d 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -162,7 +162,7 @@ void scsi_log_completion(struct scsi_cmnd *cmd, int disposition)
(level > 1)) {
scsi_print_result(cmd, "Done", disposition);
scsi_print_command(cmd);
- if (status_byte(cmd->result) & CHECK_CONDITION)
+ if (status_byte(cmd->result) == CHECK_CONDITION)
scsi_print_sense(cmd);
if (level > 3)
scmd_printk(KERN_INFO, cmd,
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index 0a875491f5a7..cc30fccc1a2e 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -100,8 +100,8 @@ static int ioctl_internal_command(struct scsi_device *sdev, char *cmd,
SCSI_LOG_IOCTL(2, sdev_printk(KERN_INFO, sdev,
"Ioctl returned 0x%x\n", result));

- if ((driver_byte(result) & DRIVER_SENSE) &&
- (scsi_sense_valid(&sshdr))) {
+ if (driver_byte(result) == DRIVER_SENSE &&
+ scsi_sense_valid(&sshdr)) {
switch (sshdr.sense_key) {
case ILLEGAL_REQUEST:
if (cmd[0] == ALLOW_MEDIUM_REMOVAL)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 41e9ac9fc138..d53eda6f1fe0 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1031,7 +1031,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
*/
if (!level && __ratelimit(&_rs)) {
scsi_print_result(cmd, NULL, FAILED);
- if (driver_byte(result) & DRIVER_SENSE)
+ if (driver_byte(result) == DRIVER_SENSE)
scsi_print_sense(cmd);
scsi_print_command(cmd);
}
@@ -2555,7 +2555,7 @@ scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
* ILLEGAL REQUEST if the code page isn't supported */

if (use_10_for_ms && !scsi_status_is_good(result) &&
- (driver_byte(result) & DRIVER_SENSE)) {
+ driver_byte(result) == DRIVER_SENSE) {
if (scsi_sense_valid(sshdr)) {
if ((sshdr->sense_key == ILLEGAL_REQUEST) &&
(sshdr->asc == 0x20) && (sshdr->ascq == 0)) {
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 0880d975eed3..78ca63dfba4a 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -614,7 +614,7 @@ static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result,
* INQUIRY should not yield UNIT_ATTENTION
* but many buggy devices do so anyway.
*/
- if ((driver_byte(result) & DRIVER_SENSE) &&
+ if (driver_byte(result) == DRIVER_SENSE &&
scsi_sense_valid(&sshdr)) {
if ((sshdr.sense_key == UNIT_ATTENTION) &&
((sshdr.asc == 0x28) ||
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 2ca150b16764..40b85b752b79 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -136,7 +136,7 @@ static int spi_execute(struct scsi_device *sdev, const void *cmd,
REQ_FAILFAST_TRANSPORT |
REQ_FAILFAST_DRIVER,
0, NULL);
- if (!(driver_byte(result) & DRIVER_SENSE) ||
+ if (driver_byte(result) != DRIVER_SENSE ||
sshdr->sense_key != UNIT_ATTENTION)
break;
}
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 9421d9877730..c38fd0af2b59 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1635,7 +1635,7 @@ static int sd_sync_cache(struct scsi_disk *sdkp, struct scsi_sense_hdr *sshdr)
if (res) {
sd_print_result(sdkp, "Synchronize Cache(10) failed", res);

- if (driver_byte(res) & DRIVER_SENSE)
+ if (driver_byte(res) == DRIVER_SENSE)
sd_print_sense_hdr(sdkp, sshdr);

/* we need to evaluate the error return */
@@ -1737,8 +1737,8 @@ static int sd_pr_command(struct block_device *bdev, u8 sa,
result = scsi_execute_req(sdev, cmd, DMA_TO_DEVICE, &data, sizeof(data),
&sshdr, SD_TIMEOUT, SD_MAX_RETRIES, NULL);

- if ((driver_byte(result) & DRIVER_SENSE) &&
- (scsi_sense_valid(&sshdr))) {
+ if (driver_byte(result) == DRIVER_SENSE &&
+ scsi_sense_valid(&sshdr)) {
sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result);
scsi_print_sense_hdr(sdev, NULL, &sshdr);
}
@@ -2095,10 +2095,10 @@ sd_spinup_disk(struct scsi_disk *sdkp)
retries++;
} while (retries < 3 &&
(!scsi_status_is_good(the_result) ||
- ((driver_byte(the_result) & DRIVER_SENSE) &&
+ ((driver_byte(the_result) == DRIVER_SENSE) &&
sense_valid && sshdr.sense_key == UNIT_ATTENTION)));

- if ((driver_byte(the_result) & DRIVER_SENSE) == 0) {
+ if (driver_byte(the_result) == DRIVER_SENSE) {
/* no sense, TUR either succeeded or failed
* with a status error */
if(!spintime && !scsi_status_is_good(the_result)) {
@@ -2224,7 +2224,7 @@ static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
struct scsi_sense_hdr *sshdr, int sense_valid,
int the_result)
{
- if (driver_byte(the_result) & DRIVER_SENSE)
+ if (driver_byte(the_result) == DRIVER_SENSE)
sd_print_sense_hdr(sdkp, sshdr);
else
sd_printk(KERN_NOTICE, sdkp, "Sense not available.\n");
@@ -3490,7 +3490,7 @@ static int sd_start_stop_device(struct scsi_disk *sdkp, int start)
SD_TIMEOUT, SD_MAX_RETRIES, 0, RQF_PM, NULL);
if (res) {
sd_print_result(sdkp, "Start/Stop Unit failed", res);
- if (driver_byte(res) & DRIVER_SENSE)
+ if (driver_byte(res) == DRIVER_SENSE)
sd_print_sense_hdr(sdkp, &sshdr);
if (scsi_sense_valid(&sshdr) &&
/* 0x3a is medium not present */
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3a811c5f70ba..6b6fafae4071 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7290,7 +7290,7 @@ static int ufshcd_set_dev_pwr_mode(struct ufs_hba *hba,
sdev_printk(KERN_WARNING, sdp,
"START_STOP failed for power mode: %d, result %x\n",
pwr_mode, ret);
- if (driver_byte(ret) & DRIVER_SENSE)
+ if (driver_byte(ret) == DRIVER_SENSE)
scsi_print_sense_hdr(sdp, NULL, &sshdr);
}

--
2.16.4