diff mbox series

usb: gadget: aspeed: fix dma map failure

Message ID 20210331045831.28700-1-rentao.bupt@gmail.com (mailing list archive)
State Accepted
Commit bd4d607044b961cecbf8c4c2f3bb5da4fb156993
Headers show
Series usb: gadget: aspeed: fix dma map failure | expand

Commit Message

Tao Ren March 31, 2021, 4:58 a.m. UTC
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>
---
 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(-)

Comments

Joel Stanley March 31, 2021, 6:19 a.m. UTC | #1
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 mbox series

Patch

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,