diff options
| author | Razmik Karapetyan <razmik@synopsys.com> | 2016-11-17 02:33:55 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-11-18 14:54:52 +0300 |
| commit | 729e65746d4f225792e33371f3ae6d614ec66032 (patch) | |
| tree | b08c5ae0069c3bd49902771fdf68657c27c489ed /drivers/usb | |
| parent | 9d8da85798cb45c803e449284c4564d572756428 (diff) | |
| download | linux-729e65746d4f225792e33371f3ae6d614ec66032.tar.xz | |
usb: dwc2: Don't program DMA address for 0 length request
Check the request length in dwc2_hsotg_start_req() function. If
length == 0, do not write DMA address to control register.
Signed-off-by: Razmik Karapetyan <razmik@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index ad0cd0e38f06..4dd5f1e2d281 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -1018,7 +1018,7 @@ static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg, /* write size / packets */ dwc2_writel(epsize, hsotg->regs + epsize_reg); - if (using_dma(hsotg) && !continuing) { + if (using_dma(hsotg) && !continuing && (length != 0)) { /* * write DMA address to control register, buffer * already synced by dwc2_hsotg_ep_queue(). |