From eaa05dfcdb12cf3a7bedf8918dc8699c00944384 Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Sat, 7 Jul 2012 23:05:28 -0400 Subject: [SCSI] usb-storage: add support for write cache quirk Add support for write cache quirk on usb hdd. scsi driver will be set to wce by detecting write cache quirk in quirk list when plugging usb hdd. Signed-off-by: Namjae Jeon Signed-off-by: Pankaj Kumar Signed-off-by: Amit Sahrawat Acked-by: Alan Stern Signed-off-by: James Bottomley --- drivers/usb/storage/scsiglue.c | 5 +++++ drivers/usb/storage/usb.c | 5 ++++- 2 files changed, 9 insertions(+), 1 deletion(-) (limited to 'drivers/usb') diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index 11418da9bc09..a3d54366afcc 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -236,6 +236,11 @@ static int slave_configure(struct scsi_device *sdev) US_FL_SCM_MULT_TARG)) && us->protocol == USB_PR_BULK) us->use_last_sector_hacks = 1; + + /* Check if write cache default on flag is set or not */ + if (us->fflags & US_FL_WRITE_CACHE) + sdev->wce_default_on = 1; + } else { /* Non-disk-type devices don't need to blacklist any pages diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index e23c30ab66da..d012fe4329e7 100644 --- 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; -- cgit v1.2.3 From 3bd4dc9bdd4eeeb5da44c669e6169373e05afb3b Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Sat, 7 Jul 2012 23:05:49 -0400 Subject: [SCSI] usb-storage: update usb devices for write cache quirk in quirk list. Update information of Seagate Portable HDD and WD My Passport HDD in quirk list. Signed-off-by: Namjae Jeon Signed-off-by: Pankaj Kumar Signed-off-by: Amit Sahrawat Acked-by: Alan Stern Signed-off-by: James Bottomley --- drivers/usb/storage/unusual_devs.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/usb') diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h index 1719886bb9be..62a31bea0634 100644 --- a/drivers/usb/storage/unusual_devs.h +++ b/drivers/usb/storage/unusual_devs.h @@ -1267,6 +1267,12 @@ UNUSUAL_DEV( 0x0af0, 0xd357, 0x0000, 0x0000, USB_SC_DEVICE, USB_PR_DEVICE, NULL, 0 ), +/* Reported by Namjae Jeon */ +UNUSUAL_DEV(0x0bc2, 0x2300, 0x0000, 0x9999, + "Seagate", + "Portable HDD", + USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_WRITE_CACHE), + /* Reported by Ben Efros */ UNUSUAL_DEV( 0x0bc2, 0x3010, 0x0000, 0x0000, "Seagate", @@ -1468,6 +1474,12 @@ UNUSUAL_DEV( 0x1058, 0x0704, 0x0000, 0x9999, USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_SANE_SENSE), +/* Reported by Namjae Jeon */ +UNUSUAL_DEV(0x1058, 0x070a, 0x0000, 0x9999, + "Western Digital", + "My Passport HDD", + USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_WRITE_CACHE), + /* Reported by Fabio Venturi * The device reports a vendor-specific bDeviceClass. */ -- cgit v1.2.3