diff options
author | Jack Pham <jackp@codeaurora.org> | 2014-10-21 16:31:10 -0700 |
---|---|---|
committer | Jiri Slaby <jslaby@suse.cz> | 2014-11-13 19:02:48 +0100 |
commit | 37529c7250788fde7107b6ad11ec779aa53b8711 (patch) | |
tree | 420fffef7e88426ae5c0f827e577858d7e936c79 /drivers/usb | |
parent | 28af2ea590152b183494a6b05d5c04fb3374d10a (diff) |
usb: dwc3: gadget: Properly initialize LINK TRB
commit 1200a82a59b6aa65758ccc92c3447b98c53cd7a2 upstream.
On ISOC endpoints the last trb_pool entry used as a
LINK TRB is not getting zeroed out correctly due to
memset being called incorrectly and in the wrong place.
If pool allocated from DMA was not zero-initialized
to begin with this will result in the size and ctrl
values being random garbage. Call memset correctly after
assignment of the trb_link pointer.
Fixes: f6bafc6a1c ("usb: dwc3: convert TRBs into bitshifts")
Signed-off-by: Jack Pham <jackp@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'drivers/usb')
-rw-r--r-- | drivers/usb/dwc3/gadget.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index c37da0c9a076..2cdf69962e31 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -532,12 +532,11 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, if (!usb_endpoint_xfer_isoc(desc)) return 0; - memset(&trb_link, 0, sizeof(trb_link)); - /* Link TRB for ISOC. The HWO bit is never reset */ trb_st_hw = &dep->trb_pool[0]; trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; + memset(trb_link, 0, sizeof(*trb_link)); trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); |