scsi: core: Introduce the BLIST_SKIP_IO_HINTS flag

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From: Bart Van Assche <bvanassche@xxxxxxx>

commit 633aeefafc9c2a07a76a62be6aac1d73c3e3defa upstream.

Prepare for skipping the IO Advice Hints Grouping mode page for USB storage
devices.

Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: Joao Machado <jocrismachado@xxxxxxxxx>
Cc: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Cc: Christian Heusel <christian@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 4f53138fffc2 ("scsi: sd: Translate data lifetime information")
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Link: https://lore.kernel.org/r/20240613211828.2077477-2-bvanassche@xxxxxxx
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/scsi/sd.c           |    4 ++++
 include/scsi/scsi_devinfo.h |    4 +++-
 2 files changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -63,6 +63,7 @@
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_dbg.h>
 #include <scsi/scsi_device.h>
+#include <scsi/scsi_devinfo.h>
 #include <scsi/scsi_driver.h>
 #include <scsi/scsi_eh.h>
 #include <scsi/scsi_host.h>
@@ -3125,6 +3126,9 @@ static void sd_read_io_hints(struct scsi
 	struct scsi_mode_data data;
 	int res;
 
+	if (sdp->sdev_bflags & BLIST_SKIP_IO_HINTS)
+		return;
+
 	res = scsi_mode_sense(sdp, /*dbd=*/0x8, /*modepage=*/0x0a,
 			      /*subpage=*/0x05, buffer, SD_BUF_SIZE, SD_TIMEOUT,
 			      sdkp->max_retries, &data, &sshdr);
--- a/include/scsi/scsi_devinfo.h
+++ b/include/scsi/scsi_devinfo.h
@@ -69,8 +69,10 @@
 #define BLIST_RETRY_ITF		((__force blist_flags_t)(1ULL << 32))
 /* Always retry ABORTED_COMMAND with ASC 0xc1 */
 #define BLIST_RETRY_ASC_C1	((__force blist_flags_t)(1ULL << 33))
+/* Do not query the IO Advice Hints Grouping mode page */
+#define BLIST_SKIP_IO_HINTS	((__force blist_flags_t)(1ULL << 34))
 
-#define __BLIST_LAST_USED BLIST_RETRY_ASC_C1
+#define __BLIST_LAST_USED BLIST_SKIP_IO_HINTS
 
 #define __BLIST_HIGH_UNUSED (~(__BLIST_LAST_USED | \
 			       (__force blist_flags_t) \


Patches currently in stable-queue which might be from bvanassche@xxxxxxx are

queue-6.9/scsi-usb-uas-do-not-query-the-io-advice-hints-grouping-mode-page-for-usb-uas-devices.patch
queue-6.9/scsi-ufs-core-free-memory-allocated-for-model-before-reinit.patch
queue-6.9/scsi-core-introduce-the-blist_skip_io_hints-flag.patch




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