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usb: dwc3: gadget: Check MPS of the request length

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commit ca3df3468e upstream.

When preparing for SG, not all the entries are prepared at once. When
resume, don't use the remaining request length to calculate for MPS
alignment. Use the entire request->length to do that.

Cc: stable@vger.kernel.org
Fixes: 5d187c0454 ("usb: dwc3: gadget: Don't setup more than requested")
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thinh Nguyen
2020-09-24 01:21:18 -07:00
committed by Greg Kroah-Hartman
parent 1c9e86c933
commit f935b70cf7
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/dwc3/gadget.c
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@@ -1057,6 +1057,8 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
struct scatterlist *s;
int i;
unsigned int length = req->request.length;
unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);
unsigned int rem = length % maxp;
unsigned int remaining = req->request.num_mapped_sgs
- req->num_queued_sgs;
@@ -1068,8 +1070,6 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
length -= sg_dma_len(s);
for_each_sg(sg, s, remaining, i) {
unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);
unsigned int rem = length % maxp;
unsigned int trb_length;
unsigned chain = true;