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linux/drivers/usb/renesas_usbhs
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Yoshihiro Shimoda 4fccb0767f 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>
2016-04-04 15:18:48 +03:00
..
common.c usb: renesas_usbhs: add R-Car Gen3 power control 2016-03-04 15:14:28 +02:00
common.h usb: renesas_usbhs: add support for USB-DMAC 2015-03-13 10:41:19 -05:00
fifo.c usb: renesas_usbhs: disable TX IRQ before starting TX DMAC transfer 2016-03-30 16:02:53 +03:00
fifo.h usb: renesas_usbhs: constify usbhs_pkt_handle structures 2016-01-24 19:45:09 -08:00
Kconfig usb: renesas_usbhs: Use ARCH_RENESAS 2016-02-20 20:21:53 -08:00
Makefile usb: renesas_usbhs: add R-Car Gen3 power control 2016-03-04 15:14:28 +02:00
mod_gadget.c usb: renesas_usbhs: fix to avoid using a disabled ep in usbhsg_queue_done() 2016-04-04 15:18:48 +03:00
mod_host.c usb: renesas_usbhs: Modify pipe configuration 2015-12-15 09:12:41 -06:00
mod.c usb: renesas_usbhs: avoid uninitialized variable use 2015-05-22 08:52:16 -05:00
mod.h
pipe.c usb: renesas_usbhs: Don't check CSSTS bit if peripheral mode 2016-03-04 15:14:28 +02:00
pipe.h usb: renesas_usbhs: constify usbhs_pkt_handle structures 2016-01-24 19:45:09 -08:00
rcar2.c usb: renesas_usbhs: Remove unneeded #include <linux/platform_data/gpio-rcar.h> 2015-10-20 16:03:36 +02:00
rcar2.h
rcar3.c usb: renesas_usbhs: add R-Car Gen3 power control 2016-03-04 15:14:28 +02:00
rcar3.h usb: renesas_usbhs: add R-Car Gen3 power control 2016-03-04 15:14:28 +02:00