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usb: gadget: aspeed: fix dma map failure

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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

Fixes: 7ecca2a4080c ("usb/gadget: Add driver for Aspeed SoC virtual hub")
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Link: https://lore.kernel.org/r/20210331045831.28700-1-rentao.bupt@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tao Ren 2021-03-30 21:58:31 -07:00 committed by Greg Kroah-Hartman
parent 04dd6e76b2
commit bd4d607044
2 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/usb/gadget/udc/aspeed-vhub/core.c
View File

@ -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;
}

2
drivers/usb/gadget/udc/aspeed-vhub/epn.c
View File

@ -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,