| Message ID | 20210331045831.28700-1-rentao.bupt@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | usb: gadget: aspeed: fix dma map failure | expand |
On Wed, 31 Mar 2021 at 05:02, <rentao.bupt@gmail.com> wrote: > > From: Tao Ren <rentao.bupt@gmail.com> > > Currently the virtual port_dev device is passed to DMA API, and this is > wrong because the device passed to DMA API calls must be the actual > hardware device performing the DMA. > > The patch replaces usb_gadget_map_request/usb_gadget_unmap_request APIs > with usb_gadget_map_request_by_dev/usb_gadget_unmap_request_by_dev APIs > so the DMA capable platform device can be passed to the DMA APIs. > > The patch fixes below backtrace detected on Facebook AST2500 OpenBMC > platforms: > > [<80106550>] show_stack+0x20/0x24 > [<80106868>] dump_stack+0x28/0x30 > [<80823540>] __warn+0xfc/0x110 > [<8011ac30>] warn_slowpath_fmt+0xb0/0xc0 > [<8011ad44>] dma_map_page_attrs+0x24c/0x314 > [<8016a27c>] usb_gadget_map_request_by_dev+0x100/0x1e4 > [<805cedd8>] usb_gadget_map_request+0x1c/0x20 > [<805cefbc>] ast_vhub_epn_queue+0xa0/0x1d8 > [<7f02f710>] usb_ep_queue+0x48/0xc4 > [<805cd3e8>] ecm_do_notify+0xf8/0x248 > [<7f145920>] ecm_set_alt+0xc8/0x1d0 > [<7f145c34>] composite_setup+0x680/0x1d30 > [<7f00deb8>] ast_vhub_ep0_handle_setup+0xa4/0x1bc > [<7f02ee94>] ast_vhub_dev_irq+0x58/0x84 > [<7f0309e0>] ast_vhub_irq+0xb0/0x1c8 > [<7f02e118>] __handle_irq_event_percpu+0x50/0x19c > [<8015e5bc>] handle_irq_event_percpu+0x38/0x8c > [<8015e758>] handle_irq_event+0x38/0x4c > > Signed-off-by: Tao Ren <rentao.bupt@gmail.com> Fixes: 7ecca2a4080c ("usb/gadget: Add driver for Aspeed SoC virtual hub") Reviewed-by: Joel Stanley <joel@jms.id.au> Thanks Tao! > --- > drivers/usb/gadget/udc/aspeed-vhub/core.c | 3 ++- > drivers/usb/gadget/udc/aspeed-vhub/epn.c | 2 +- > 2 files changed, 3 insertions(+), 2 deletions(-) > > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c > index be7bb64e3594..d11d3d14313f 100644 > --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c > +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c > @@ -36,6 +36,7 @@ void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req, > int status) > { > bool internal = req->internal; > + struct ast_vhub *vhub = ep->vhub; > > EPVDBG(ep, "completing request @%p, status %d\n", req, status); > > @@ -46,7 +47,7 @@ void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req, > > if (req->req.dma) { > if (!WARN_ON(!ep->dev)) > - usb_gadget_unmap_request(&ep->dev->gadget, > + usb_gadget_unmap_request_by_dev(&vhub->pdev->dev, > &req->req, ep->epn.is_in); > req->req.dma = 0; > } > diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c > index 02d8bfae58fb..cb164c615e6f 100644 > --- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c > +++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c > @@ -376,7 +376,7 @@ static int ast_vhub_epn_queue(struct usb_ep* u_ep, struct usb_request *u_req, > if (ep->epn.desc_mode || > ((((unsigned long)u_req->buf & 7) == 0) && > (ep->epn.is_in || !(u_req->length & (u_ep->maxpacket - 1))))) { > - rc = usb_gadget_map_request(&ep->dev->gadget, u_req, > + rc = usb_gadget_map_request_by_dev(&vhub->pdev->dev, u_req, > ep->epn.is_in); > if (rc) { > dev_warn(&vhub->pdev->dev, > -- > 2.17.1 >
diff --git a/drivers/usb/gadget/udc/aspeed-vhub/core.c b/drivers/usb/gadget/udc/aspeed-vhub/core.c index be7bb64e3594..d11d3d14313f 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/core.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/core.c @@ -36,6 +36,7 @@ void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req, int status) { bool internal = req->internal; + struct ast_vhub *vhub = ep->vhub; EPVDBG(ep, "completing request @%p, status %d\n", req, status); @@ -46,7 +47,7 @@ void ast_vhub_done(struct ast_vhub_ep *ep, struct ast_vhub_req *req, if (req->req.dma) { if (!WARN_ON(!ep->dev)) - usb_gadget_unmap_request(&ep->dev->gadget, + usb_gadget_unmap_request_by_dev(&vhub->pdev->dev, &req->req, ep->epn.is_in); req->req.dma = 0; } diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c index 02d8bfae58fb..cb164c615e6f 100644 --- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c +++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c @@ -376,7 +376,7 @@ static int ast_vhub_epn_queue(struct usb_ep* u_ep, struct usb_request *u_req, if (ep->epn.desc_mode || ((((unsigned long)u_req->buf & 7) == 0) && (ep->epn.is_in || !(u_req->length & (u_ep->maxpacket - 1))))) { - rc = usb_gadget_map_request(&ep->dev->gadget, u_req, + rc = usb_gadget_map_request_by_dev(&vhub->pdev->dev, u_req, ep->epn.is_in); if (rc) { dev_warn(&vhub->pdev->dev,