Merge

drivers/scsi/scsi_devinfo.c

@@ -333,7 +333,7 @@ int scsi_get_device_flags(struct scsi_device *sdev, unsigned char *vendor,
 	struct scsi_dev_info_list *devinfo;
 	unsigned int bflags;
 
-	bflags = sdev->host->hostt->flags;
+	bflags = sdev->sdev_bflags;
 	if (!bflags)
 		bflags = scsi_default_dev_flags;
 

drivers/scsi/scsi_scan.c

@@ -646,6 +646,9 @@ static int scsi_add_lun(struct scsi_device *sdev, char *inq_result, int *bflags)
 	 * may do I/O */
 	scsi_device_set_state(sdev, SDEV_RUNNING);
 
+	if (*bflags & BLIST_MS_192_BYTES_FOR_3F)
+		sdev->use_192_bytes_for_3f = 1;
+
 	if(sdev->host->hostt->slave_configure)
 		sdev->host->hostt->slave_configure(sdev);
 

drivers/scsi/sd.c

@@ -1122,26 +1122,32 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, char *diskname,
 		return;
 	}
 
-	/*
-	 * First attempt: ask for all pages (0x3F), but only 4 bytes.
-	 * We have to start carefully: some devices hang if we ask
-	 * for more than is available.
-	 */
-	res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 4, &data);
+	if (sdkp->device->use_192_bytes_for_3f) {
+		res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 192, &data);
+	} else {
+		/*
+		 * First attempt: ask for all pages (0x3F), but only 4 bytes.
+		 * We have to start carefully: some devices hang if we ask
+		 * for more than is available.
+		 */
+		res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 4, &data);
 
-	/*
-	 * Second attempt: ask for page 0
-	 * When only page 0 is implemented, a request for page 3F may return
-	 * Sense Key 5: Illegal Request, Sense Code 24: Invalid field in CDB.
-	 */
-	if (!scsi_status_is_good(res))
-		res = sd_do_mode_sense(SRpnt, 0, 0, buffer, 4, &data);
+		/*
+		 * Second attempt: ask for page 0 When only page 0 is
+		 * implemented, a request for page 3F may return Sense Key
+		 * 5: Illegal Request, Sense Code 24: Invalid field in
+		 * CDB.
+		 */
+		if (!scsi_status_is_good(res))
+			res = sd_do_mode_sense(SRpnt, 0, 0, buffer, 4, &data);
 
-	/*
-	 * Third attempt: ask 255 bytes, as we did earlier.
-	 */
-	if (!scsi_status_is_good(res))
-		res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 255, &data);
+		/*
+		 * Third attempt: ask 255 bytes, as we did earlier.
+		 */
+		if (!scsi_status_is_good(res))
+			res = sd_do_mode_sense(SRpnt, 0, 0x3F, buffer, 255,
+					       &data);
+	}
 
 	if (!scsi_status_is_good(res)) {
 		printk(KERN_WARNING

drivers/usb/storage/scsiglue.c

@@ -64,6 +64,17 @@ static const char* host_info(struct Scsi_Host *host)
 	return "SCSI emulation for USB Mass Storage devices";
 }
 
+static int slave_alloc (struct scsi_device *sdev)
+{
+	/*
+	 * Set default bflags. These can be overridden for individual
+	 * models and vendors via the scsi devinfo mechanism.
+	 */
+	sdev->sdev_bflags = (BLIST_MS_SKIP_PAGE_08 | BLIST_MS_SKIP_PAGE_3F |
+			     BLIST_USE_10_BYTE_MS);
+	return 0;
+}
+
 static int slave_configure (struct scsi_device *sdev)
 {
 	/* Scatter-gather buffers (all but the last) must have a length
@@ -365,6 +376,7 @@ struct scsi_host_template usb_stor_host_template = {
 	/* unknown initiator id */
 	.this_id =			-1,
 
+	.slave_alloc =			slave_alloc,
 	.slave_configure =		slave_configure,
 
 	/* lots of sg segments can be handled */
@@ -385,10 +397,6 @@ struct scsi_host_template usb_stor_host_template = {
 	/* sysfs device attributes */
 	.sdev_attrs =			sysfs_device_attr_list,
 
-	/* modify scsi_device bits on probe */
-	.flags = (BLIST_MS_SKIP_PAGE_08 | BLIST_MS_SKIP_PAGE_3F |
-		  BLIST_USE_10_BYTE_MS),
-
 	/* module management */
 	.module =			THIS_MODULE
 };

include/scsi/scsi_device.h

@@ -71,6 +71,10 @@ struct scsi_device {
 	unsigned char current_tag;	/* current tag */
 	struct scsi_target      *sdev_target;   /* used only for single_lun */
 
+	unsigned int	sdev_bflags; /* black/white flags as also found in
+				 * scsi_devinfo.[hc]. For now used only to
+				 * pass settings from slave_alloc to scsi
+				 * core. */
 	unsigned writeable:1;
 	unsigned removable:1;
 	unsigned changed:1;	/* Data invalid due to media change */
@@ -98,6 +102,7 @@ struct scsi_device {
 	unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
 	unsigned skip_ms_page_8:1;	/* do not use MODE SENSE page 0x08 */
 	unsigned skip_ms_page_3f:1;	/* do not use MODE SENSE page 0x3f */
+	unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
 	unsigned no_start_on_add:1;	/* do not issue start on add */
 	unsigned allow_restart:1; /* issue START_UNIT in error handler */
 

include/scsi/scsi_devinfo.h

@@ -19,4 +19,5 @@
 #define BLIST_MS_SKIP_PAGE_08	0x2000	/* do not send ms page 0x08 */
 #define BLIST_MS_SKIP_PAGE_3F	0x4000	/* do not send ms page 0x3f */
 #define BLIST_USE_10_BYTE_MS	0x8000	/* use 10 byte ms before 6 byte ms */
+#define BLIST_MS_192_BYTES_FOR_3F	0x10000	/*  192 byte ms page 0x3f request */
 #endif

include/scsi/scsi_host.h

@@ -345,12 +345,6 @@ struct scsi_host_template {
 	 * module_init/module_exit.
 	 */
 	struct list_head legacy_hosts;
-
-	/*
-	 * Default flags settings, these modify the setting of scsi_device
-	 * bits.
-	 */
-	unsigned int flags;
 };
 
 /*