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usb: ci_udc: fix freeing of ep0 req
ci_ep_alloc_request() avoids allocating multiple request objects for ep0 by keeping a record of the first req allocated for ep0, and always returning that instead of allocating a new req. However, if this req is ever freed, the record of the previous allocation is not cleared, so ci_ep_alloc_request() will keep returning this stale pointer. Fix ci_ep_free_request() to clear the record of the previous allocation. Signed-off-by: Stephen Warren <swarren@nvidia.com>
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1 changed files with 7 additions and 2 deletions
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@ -221,9 +221,14 @@ ci_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags)
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static void ci_ep_free_request(struct usb_ep *ep, struct usb_request *req)
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{
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struct ci_req *ci_req;
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struct ci_ep *ci_ep = container_of(ep, struct ci_ep, ep);
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struct ci_req *ci_req = container_of(req, struct ci_req, req);
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int num;
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num = ci_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
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if (num == 0)
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controller.ep0_req = 0;
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ci_req = container_of(req, struct ci_req, req);
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if (ci_req->b_buf)
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free(ci_req->b_buf);
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free(ci_req);
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