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USB: musb: fix data toggle saving with shared FIFO
For some strange reason the host side musb_giveback() decides that it's always got an IN transfer when the hardware endpoint is using a shared FIFO. This causes musb_save_toggle() to read the toggle state from the RXCSR register instead of TXCSR, and may also cause unneeded reloading of RX endpoint registers. Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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1 changed files with 1 additions and 6 deletions
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@ -335,16 +335,11 @@ musb_save_toggle(struct musb_hw_ep *ep, int is_in, struct urb *urb)
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static struct musb_qh *
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musb_giveback(struct musb_qh *qh, struct urb *urb, int status)
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{
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int is_in;
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struct musb_hw_ep *ep = qh->hw_ep;
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struct musb *musb = ep->musb;
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int is_in = usb_pipein(urb->pipe);
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int ready = qh->is_ready;
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if (ep->is_shared_fifo)
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is_in = 1;
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else
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is_in = usb_pipein(urb->pipe);
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/* save toggle eagerly, for paranoia */
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switch (qh->type) {
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case USB_ENDPOINT_XFER_BULK:
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