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| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2016-04-04 13:40:20 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-04-04 14:18:48 +0200 |
| commit | 4fccb0767fdbdb781a9c5b5c15ee7b219443c89d (patch) | |
| tree | a8b5397bdd5d8ba5bd41c16e51674ec91fd4e4bf /fs/dlm/netlink.c | |
| parent | usb: dwc2: do not override forced dr_mode in gadget setup (diff) | |
| download | linux-4fccb0767fdbdb781a9c5b5c15ee7b219443c89d.tar.xz linux-4fccb0767fdbdb781a9c5b5c15ee7b219443c89d.zip | |
usb: renesas_usbhs: fix to avoid using a disabled ep in usbhsg_queue_done()
This patch fixes an issue that usbhsg_queue_done() may cause kernel
panic when dma callback is running and usb_ep_disable() is called
by interrupt handler. (Especially, we can reproduce this issue using
g_audio with usb-dmac driver.)
For example of a flow:
usbhsf_dma_complete (on tasklet)
--> usbhsf_pkt_handler (on tasklet)
--> usbhsg_queue_done (on tasklet)
*** interrupt happened and usb_ep_disable() is called ***
--> usbhsg_queue_pop (on tasklet)
Then, oops happened.
Fixes: e73a989 ("usb: renesas_usbhs: add DMAEngine support")
Cc: <stable@vger.kernel.org> # v3.1+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'fs/dlm/netlink.c')
0 files changed, 0 insertions, 0 deletions