diff options
| author | Peter Chen <peter.chen@nxp.com> | 2020-11-25 20:35:23 +0800 |
|---|---|---|
| committer | Peter Chen <peter.chen@nxp.com> | 2020-11-30 13:48:32 +0800 |
| commit | 24fdaeeb294c14ea743ec99ada92380c060a428a (patch) | |
| tree | a22f399405c2f51b62be853e78bdc9e9eb8a4391 /drivers/usb | |
| parent | 6703052fe30fa0d85f1fbbf50171486cb0148d2d (diff) | |
| download | linux-24fdaeeb294c14ea743ec99ada92380c060a428a.tar.bz2 | |
usb: cdns3: gadget: clear trb->length as zero after preparing every trb
It clears trb->length as zero before preparing td, but if scatter
buffer is used for td, there are several trbs within td, it needs to clear
every trb->length as zero, otherwise, the default value for trb->length
may not be zero after it begins to use the second round of trb rings.
Fixes: abc6b579048e ("usb: cdns3: gadget: using correct sg operations")
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/cdns3/gadget.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c index 365f30fb1159..0aa85cc07ff1 100644 --- a/drivers/usb/cdns3/gadget.c +++ b/drivers/usb/cdns3/gadget.c @@ -1260,6 +1260,7 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep, priv_req->end_trb = priv_ep->enqueue; cdns3_ep_inc_enq(priv_ep); trb = priv_ep->trb_pool + priv_ep->enqueue; + trb->length = 0; } while (sg_iter < num_trb); trb = priv_req->trb; |