diff options
| author | Namjae Jeon <namjae.jeon@samsung.com> | 2012-07-08 03:05:28 (GMT) |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-07-20 07:59:00 (GMT) |
| commit | eaa05dfcdb12cf3a7bedf8918dc8699c00944384 (patch) | |
| tree | f05101a4a1353bbb578fa2a83634ab7404335873 /drivers/usb | |
| parent | b81478d82e389dd0961760f5ff6f56b50d29db6d (diff) | |
| download | linux-fsl-qoriq-eaa05dfcdb12cf3a7bedf8918dc8699c00944384.tar.xz | |
[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 <namjae.jeon@samsung.com>
Signed-off-by: Pankaj Kumar <pankaj.km@samsung.com>
Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/storage/scsiglue.c | 5 | ||||
| -rw-r--r-- | drivers/usb/storage/usb.c | 5 |
2 files changed, 9 insertions, 1 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index 11418da..a3d5436 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 e23c30a..d012fe4 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; |