Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-11 14:42:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

usb: renesas_usbhs: gadget: fix re-enabling pipe without re-connecting

Browse Source 
This patch fixes an issue that the renesas_usbhs driver in gadget mode
cannot work correctly even if I disabled DMAC of the driver when I used
the g_zero driver and the testusb tool.

When a usb cable is re-connected, the renesas_usbhs driver calls the
usbhsp_flags_init() (via usbhs_hotplug() --> usbhs_mod_call(start) -->
usbhsg_try_start() --> usbhs_pipe_init()). However, the driver doesn't
call the usbhsp_flags_init() when usbhsg_ep_disable() is called.
So, if a gadget driver calls usb_ep_enable() and usb_ep_disable() again
and again, the renesas_usbhs driver will output the following log:

  renesas_usbhs renesas_usbhs: can't get pipe (BULK)
  renesas_usbhs renesas_usbhs: wrong recip request

Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Yoshihiro Shimoda 2014-07-09 20:30:13 +09:00 committed by Felipe Balbi
parent 6a0541599f
commit dfb87b8bfe
3 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/renesas_usbhs/mod_gadget.c
View File

@ -600,8 +600,10 @@ static int usbhsg_ep_enable(struct usb_ep *ep,
static int usbhsg_ep_disable(struct usb_ep *ep)
{
struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
usbhsg_pipe_disable(uep);
usbhs_pipe_free(pipe);
uep->pipe->mod_private = NULL;
uep->pipe = NULL;

10
drivers/usb/renesas_usbhs/pipe.c
View File

@ -640,6 +640,11 @@ static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
return pipe;
}
static void usbhsp_put_pipe(struct usbhs_pipe *pipe)
{
usbhsp_flags_init(pipe);
}
void usbhs_pipe_init(struct usbhs_priv *priv,
int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map))
{
@ -727,6 +732,11 @@ struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv,
return pipe;
}
void usbhs_pipe_free(struct usbhs_pipe *pipe)
{
usbhsp_put_pipe(pipe);
}
void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo)
{
if (pipe->fifo)

1
drivers/usb/renesas_usbhs/pipe.h
View File

@ -75,6 +75,7 @@ struct usbhs_pipe_info {
char *usbhs_pipe_name(struct usbhs_pipe *pipe);
struct usbhs_pipe
*usbhs_pipe_malloc(struct usbhs_priv *priv, int endpoint_type, int dir_in);
void usbhs_pipe_free(struct usbhs_pipe *pipe);
int usbhs_pipe_probe(struct usbhs_priv *priv);
void usbhs_pipe_remove(struct usbhs_priv *priv);
int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe);