Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Two fixes: one in the ufs driver fixing an obvious memory leak and the
  other (with a core flag based update) trying to prevent USB crashes by
  stopping the core from issuing a request for the I/O Hints mode page"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: usb: uas: Do not query the IO Advice Hints Grouping mode page for USB/UAS devices
  scsi: core: Introduce the BLIST_SKIP_IO_HINTS flag
  scsi: ufs: core: Free memory allocated for model before reinit

Author: torvalds

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>
@@ -3118,6 +3119,9 @@ static void sd_read_io_hints(struct scsi_disk *sdkp, unsigned char *buffer)
 	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);

drivers/ufs/core/ufshcd.c

@@ -8787,6 +8787,7 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool init_dev_params)
 	    (hba->quirks & UFSHCD_QUIRK_REINIT_AFTER_MAX_GEAR_SWITCH)) {
 		/* Reset the device and controller before doing reinit */
 		ufshcd_device_reset(hba);
+		ufs_put_device_desc(hba);
 		ufshcd_hba_stop(hba);
 		ufshcd_vops_reinit_notify(hba);
 		ret = ufshcd_hba_enable(hba);

drivers/usb/storage/scsiglue.c

@@ -79,6 +79,12 @@ static int slave_alloc (struct scsi_device *sdev)
 	if (us->protocol == USB_PR_BULK && us->max_lun > 0)
 		sdev->sdev_bflags |= BLIST_FORCELUN;
 
+	/*
+	 * Some USB storage devices reset if the IO advice hints grouping mode
+	 * page is queried. Hence skip that mode page.
+	 */
+	sdev->sdev_bflags |= BLIST_SKIP_IO_HINTS;
+
 	return 0;
 }
 

drivers/usb/storage/uas.c

@@ -21,6 +21,7 @@
 #include <scsi/scsi.h>
 #include <scsi/scsi_eh.h>
 #include <scsi/scsi_dbg.h>
+#include <scsi/scsi_devinfo.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_device.h>
 #include <scsi/scsi_host.h>
@@ -820,6 +821,12 @@ static int uas_slave_alloc(struct scsi_device *sdev)
 	struct uas_dev_info *devinfo =
 		(struct uas_dev_info *)sdev->host->hostdata;
 
+	/*
+	 * Some USB storage devices reset if the IO advice hints grouping mode
+	 * page is queried. Hence skip that mode page.
+	 */
+	sdev->sdev_bflags |= BLIST_SKIP_IO_HINTS;
+
 	sdev->hostdata = devinfo;
 	return 0;
 }

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) \