Commits
Yoshihiro Shimoda committed ffb9da65755
usb: renesas_usbhs: fix NULL pointer dereference in dma_release_channel() This patch fixes an issue that the following commit causes NULL pointer dereference in dma_release_channel(). "usb: renesas_usbhs: add support for requesting DT DMA" (commit id abd2dbf6bb1b5f3a03a8c76b1a8879da1dd30caa) The usbhsf_dma_init_dt() should set fifo->{t,r}x_chan to NULL if dma_request_slave_channel_reason() returns IS_ERR value. Otherwise, usbhsf_dma_quit() will call dma_release_channel(), and then NULL pointer dereference happens. Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Simon Horman <horms+renesas@verge.net.au> Reported-by: Simon Horman <horms@verge.net.au> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Felipe Balbi <balbi@ti.com>