[PATCH 3.14 07/53] usb: musb: Ensure rx reinit occurs for shared_fifo endpoints
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2016-07-25 22:47:27
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3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andrew Goodbody <redacted> commit f3eec0cf784e0d6c47822ca6b66df3d5812af7e6 upstream. shared_fifo endpoints would only get a previous tx state cleared out, the rx state was only cleared for non shared_fifo endpoints Change this so that the rx state is cleared for all endpoints. This addresses an issue that resulted in rx packets being dropped silently. Signed-off-by: Andrew Goodbody <redacted> Signed-off-by: Bin Liu <b-liu@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/usb/musb/musb_host.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c@@ -583,14 +583,13 @@ musb_rx_reinit(struct musb *musb, struct musb_writew(ep->regs, MUSB_TXCSR, 0); /* scrub all previous state, clearing toggle */ - } else { - csr = musb_readw(ep->regs, MUSB_RXCSR); - if (csr & MUSB_RXCSR_RXPKTRDY) - WARNING("rx%d, packet/%d ready?\n", ep->epnum, - musb_readw(ep->regs, MUSB_RXCOUNT)); - - musb_h_flush_rxfifo(ep, MUSB_RXCSR_CLRDATATOG); } + csr = musb_readw(ep->regs, MUSB_RXCSR); + if (csr & MUSB_RXCSR_RXPKTRDY) + WARNING("rx%d, packet/%d ready?\n", ep->epnum, + musb_readw(ep->regs, MUSB_RXCOUNT)); + + musb_h_flush_rxfifo(ep, MUSB_RXCSR_CLRDATATOG); /* target addr and (for multipoint) hub addr/port */ if (musb->is_multipoint) {