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usb: langwell_udc: fix big file transfer issue.

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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>
This commit is contained in:
Christophe Lebouc 2010-09-30 15:34:36 +01:00 committed by Greg Kroah-Hartman
parent 689d6eacd1
commit c8458d59d4
1 changed files with 4 additions and 2 deletions
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6
drivers/usb/gadget/langwell_udc.c
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@ -2440,12 +2440,14 @@ static int process_ep_req(struct langwell_udc *dev, int index,
dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__); dev_vdbg(&dev->pdev->dev, "---> %s()\n", __func__);
for (i = 0; i < curr_req->dtd_count; i++) { 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 */ /* command execution states by dTD */
dtd_status = curr_dtd->dtd_status; dtd_status = curr_dtd->dtd_status;
barrier();
remaining_length = le16_to_cpu(curr_dtd->dtd_total);
actual -= remaining_length;
if (!dtd_status) { if (!dtd_status) {
/* transfers completed successfully */ /* transfers completed successfully */
if (!remaining_length) { if (!remaining_length) {