[PATCH v5 01/13] scsi: core: need to check the result of scsi_execute in scsi_report_opcode

[zhengbin <zhengbin13@xxxxxxxxxx>]

Like sd_pr_command, before use sshdr, we need to check the result
of scsi_execute.

Signed-off-by: zhengbin <zhengbin13@xxxxxxxxxx>
---
 drivers/scsi/scsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 4f76841..15d1fe9 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -509,7 +509,7 @@ int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer,
 	result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buffer, len,
 				  &sshdr, 30 * HZ, 3, NULL);

-	if (result && scsi_sense_valid(&sshdr) &&
+	if (driver_byte(result) == DRIVER_SENSE && scsi_sense_valid(&sshdr) &&
 	    sshdr.sense_key == ILLEGAL_REQUEST &&
 	    (sshdr.asc == 0x20 || sshdr.asc == 0x24) && sshdr.ascq == 0x00)
 		return -EINVAL;
--
2.7.4