[SCSI] usb-storage: add support for write cache quirk

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / usb / storage / usb.c

diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index e23c30a..d012fe4 100644 (file)
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -473,7 +473,7 @@ static void adjust_quirks(struct us_data *us)
                        US_FL_CAPACITY_OK | US_FL_IGNORE_RESIDUE |
                        US_FL_SINGLE_LUN | US_FL_NO_WP_DETECT |
                        US_FL_NO_READ_DISC_INFO | US_FL_NO_READ_CAPACITY_16 |
-                       US_FL_INITIAL_READ10);
+                       US_FL_INITIAL_READ10 | US_FL_WRITE_CACHE);
 
        p = quirks;
        while (*p) {
@@ -529,6 +529,9 @@ static void adjust_quirks(struct us_data *us)
                case 'o':
                        f |= US_FL_CAPACITY_OK;
                        break;
+               case 'p':
+                       f |= US_FL_WRITE_CACHE;
+                       break;
                case 'r':
                        f |= US_FL_IGNORE_RESIDUE;
                        break;