4fccb0767f
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:
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|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| common.c | ||
| common.h | ||
| fifo.c | ||
| fifo.h | ||
| mod.c | ||
| mod.h | ||
| mod_gadget.c | ||
| mod_host.c | ||
| pipe.c | ||
| pipe.h | ||
| rcar2.c | ||
| rcar2.h | ||
| rcar3.c | ||
| rcar3.h | ||