diff options
| author |   Christophe Lebouc <christophex.lebouc@intel.com> | 2010-09-30 15:34:36 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-22 10:22:00 -0700 |
| commit | c8458d59d424fcba2456d6cba5811ce01c3aedb9 (patch) | |
| tree | 04e17096ae00af488ea8aa49488dc3496df7eaa3 /drivers/usb/gadget | |
| parent | USB: UHCI: add native scatter-gather support(v1) (diff) | |
| download | linux-dev-c8458d59d424fcba2456d6cba5811ce01c3aedb9.tar.xz linux-dev-c8458d59d424fcba2456d6cba5811ce01c3aedb9.zip | |
usb: langwell_udc: fix big file transfer issue.
This patch fixing the problem with large file transfers failing. Swap the read
order to avoid unexpected RX status.
Signed-off-by: Christophe Lebouc <christophex.lebouc@intel.com>
Signed-off-by: Hao Wu <hao.wu@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/langwell_udc.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c index d297f9eb92e4..064306046702 100644 --- a/drivers/usb/gadget/langwell_udc.c +++ b/drivers/usb/gadget/langwell_udc.c @@ -2440,12 +2440,14 @@ static int process_ep_req(struct langwell_udc *dev, int index, dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); for (i = 0; i < curr_req->dtd_count; i++) { - remaining_length = le16_to_cpu(curr_dtd->dtd_total); - actual -= remaining_length; /* command execution states by dTD */ dtd_status = curr_dtd->dtd_status; + barrier(); + remaining_length = le16_to_cpu(curr_dtd->dtd_total); + actual -= remaining_length; + if (!dtd_status) { /* transfers completed successfully */ if (!remaining_length) { |