| From | Willy Tarreau <> | Subject | [PATCH 3.10 035/180] usb: musb: Ensure rx reinit occurs for shared_fifo endpoints | Date | Sun, 21 Aug 2016 17:29:25 +0200 |
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From: Andrew Goodbody <andrew.goodbody@cambrionix.com>
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 <andrew.goodbody@cambrionix.com> Cc: stable@vger.kernel.org Signed-off-by: Bin Liu <b-liu@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Willy Tarreau <w@1wt.eu> --- drivers/usb/musb/musb_host.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index cdadbe6..c6cc520 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -581,14 +581,13 @@ musb_rx_reinit(struct musb *musb, struct musb_qh *qh, struct musb_hw_ep *ep) 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) { -- 2.8.0.rc2.1.gbe9624a
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