X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=kernel%2Fdrivers%2Fusb%2Fstorage%2Fuas.c;h=e26e32169a364e2903edf49829b9262c8ba877d6;hb=52f993b8e89487ec9ee15a7fb4979e0f09a45b27;hp=6d3122afeed33e9cfe1b571c3acaf19dac967da4;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/kernel/drivers/usb/storage/uas.c b/kernel/drivers/usb/storage/uas.c
index 6d3122afe..e26e32169 100644
--- a/kernel/drivers/usb/storage/uas.c
+++ b/kernel/drivers/usb/storage/uas.c
@@ -2,7 +2,7 @@
  * USB Attached SCSI
  * Note that this is not the same as the USB Mass Storage driver
  *
- * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013 - 2014
+ * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013 - 2016
  * Copyright Matthew Wilcox for Intel Corp, 2010
  * Copyright Sarah Sharp for Intel Corp, 2010
  *
@@ -257,17 +257,16 @@ static void uas_stat_cmplt(struct urb *urb)
 	struct uas_cmd_info *cmdinfo;
 	unsigned long flags;
 	unsigned int idx;
+	int status = urb->status;
 
 	spin_lock_irqsave(&devinfo->lock, flags);
 
 	if (devinfo->resetting)
 		goto out;
 
-	if (urb->status) {
-		if (urb->status != -ENOENT && urb->status != -ECONNRESET) {
-			dev_err(&urb->dev->dev, "stat urb: status %d\n",
-				urb->status);
-		}
+	if (status) {
+		if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN)
+			dev_err(&urb->dev->dev, "stat urb: status %d\n", status);
 		goto out;
 	}
 
@@ -348,6 +347,7 @@ static void uas_data_cmplt(struct urb *urb)
 	struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
 	struct scsi_data_buffer *sdb = NULL;
 	unsigned long flags;
+	int status = urb->status;
 
 	spin_lock_irqsave(&devinfo->lock, flags);
 
@@ -374,9 +374,9 @@ static void uas_data_cmplt(struct urb *urb)
 		goto out;
 	}
 
-	if (urb->status) {
-		if (urb->status != -ENOENT && urb->status != -ECONNRESET)
-			uas_log_cmd_state(cmnd, "data cmplt err", urb->status);
+	if (status) {
+		if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN)
+			uas_log_cmd_state(cmnd, "data cmplt err", status);
 		/* error: no data transfered */
 		sdb->resid = sdb->length;
 	} else {
@@ -757,6 +757,17 @@ static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd)
 	return SUCCESS;
 }
 
+static int uas_target_alloc(struct scsi_target *starget)
+{
+	struct uas_dev_info *devinfo = (struct uas_dev_info *)
+			dev_to_shost(starget->dev.parent)->hostdata;
+
+	if (devinfo->flags & US_FL_NO_REPORT_LUNS)
+		starget->no_report_luns = 1;
+
+	return 0;
+}
+
 static int uas_slave_alloc(struct scsi_device *sdev)
 {
 	struct uas_dev_info *devinfo =
@@ -796,6 +807,10 @@ static int uas_slave_configure(struct scsi_device *sdev)
 	if (devinfo->flags & US_FL_NO_REPORT_OPCODES)
 		sdev->no_report_opcodes = 1;
 
+	/* A few buggy USB-ATA bridges don't understand FUA */
+	if (devinfo->flags & US_FL_BROKEN_FUA)
+		sdev->broken_fua = 1;
+
 	scsi_change_queue_depth(sdev, devinfo->qdepth - 2);
 	return 0;
 }
@@ -804,16 +819,15 @@ static struct scsi_host_template uas_host_template = {
 	.module = THIS_MODULE,
 	.name = "uas",
 	.queuecommand = uas_queuecommand,
+	.target_alloc = uas_target_alloc,
 	.slave_alloc = uas_slave_alloc,
 	.slave_configure = uas_slave_configure,
 	.eh_abort_handler = uas_eh_abort_handler,
 	.eh_bus_reset_handler = uas_eh_bus_reset_handler,
-	.can_queue = 65536,	/* Is there a limit on the _host_ ? */
+	.can_queue = MAX_CMNDS,
 	.this_id = -1,
 	.sg_tablesize = SG_NONE,
-	.cmd_per_lun = 1,	/* until we override it */
 	.skip_settle_delay = 1,
-	.use_blk_tags = 1,
 };
 
 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
@@ -930,9 +944,11 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	if (result)
 		goto set_alt0;
 
-	result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2);
-	if (result)
-		goto free_streams;
+	/*
+	 * 1 tag is reserved for untagged commands +
+	 * 1 tag to avoid off by one errors in some bridge firmwares
+	 */
+	shost->can_queue = devinfo->qdepth - 2;
 
 	usb_set_intfdata(intf, shost);
 	result = scsi_add_host(shost, &intf->dev);