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| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2014-08-22 15:13:50 +0400 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-09-03 18:15:57 +0400 |
| commit | 8355b2b3082d302091506703d2e4e239f7deed7f (patch) | |
| tree | 7d883ae6ca66cb0778b45692bd00bf1342cb20fd /drivers/usb/renesas_usbhs/pipe.h | |
| parent | f0798d6a04867ad8db8b41ddea45627d2c8cffe3 (diff) | |
| download | linux-8355b2b3082d302091506703d2e4e239f7deed7f.tar.xz | |
usb: renesas_usbhs: fix the behavior of some usbhs_pkt_handle
Some gadget drivers will call usb_ep_queue() more than once before
the first queue doesn't finish. However, this driver didn't handle
it correctly. So, this patch fixes the behavior of some
usbhs_pkt_handle using the "running" flag. Otherwise, the oops below
happens if we use g_ncm driver and when the "iperf -u -c host -b 200M"
is running.
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000
Internal error: Oops: 80000007 [#1] SMP ARM
Modules linked in: usb_f_ncm g_ncm libcomposite u_ether
CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 3.17.0-rc1-00008-g8b2be8a-dirty #20
task: c051c7e0 ti: c0512000 task.ti: c0512000
PC is at 0x0
LR is at usbhsf_pkt_handler+0xa8/0x114
pc : [<00000000>] lr : [<c0278fb4>] psr: 60000193
sp : c0513ce8 ip : c0513c58 fp : c0513d24
r10: 00000001 r9 : 00000193 r8 : eebec4a0
r7 : eebec410 r6 : eebe0c6c r5 : 00000000 r4 : ee4a2774
r3 : 00000000 r2 : ee251e00 r1 : c0513cf4 r0 : ee4a2774
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/renesas_usbhs/pipe.h')
| -rw-r--r-- | drivers/usb/renesas_usbhs/pipe.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/renesas_usbhs/pipe.h b/drivers/usb/renesas_usbhs/pipe.h index 406f36d050e4..d24a05972370 100644 --- a/drivers/usb/renesas_usbhs/pipe.h +++ b/drivers/usb/renesas_usbhs/pipe.h @@ -36,6 +36,7 @@ struct usbhs_pipe { #define USBHS_PIPE_FLAGS_IS_USED (1 << 0) #define USBHS_PIPE_FLAGS_IS_DIR_IN (1 << 1) #define USBHS_PIPE_FLAGS_IS_DIR_HOST (1 << 2) +#define USBHS_PIPE_FLAGS_IS_RUNNING (1 << 3) struct usbhs_pkt_handle *handler; @@ -80,6 +81,9 @@ 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); int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe); +int usbhs_pipe_is_running(struct usbhs_pipe *pipe); +void usbhs_pipe_running(struct usbhs_pipe *pipe, int running); + void usbhs_pipe_init(struct usbhs_priv *priv, int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map)); int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe); |