diff options
| author | Pankaj Bharadiya <pankaj.bharadiya@ti.com> | 2012-09-13 09:38:16 +0000 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2012-10-23 08:33:17 -0700 |
| commit | 3f0be8ea9217311ec41156fd89e3e23a0308f3b2 (patch) | |
| tree | ba21021eefcd5ca701b0b689b272f06689df633b /drivers/usb | |
| parent | 39826f09978a0a7070999acc15babf88f03e4051 (diff) | |
USB: musb_udc: Make musb_peri_rx_ep check for MUSB_RXCSR_RXPKTRDY
The endpoint rx count register value will be zero if it is read before
receive packet ready bit (PERI_RXCSR:RXPKTRDY) is set.
Check for the receive packet ready bit (PERI_RXCSR:RXPKTRDY) before
reading endpoint rx count register. Proceed with rx count read and
FIFO read only if RXPKTRDY bit is set.
Signed-off-by: Pankaj Bharadiya <pankaj.bharadiya@ti.com>
Signed-off-by: Tom Rini <trini@ti.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/musb/musb_udc.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/usb/musb/musb_udc.c b/drivers/usb/musb/musb_udc.c index 09cdec31a9..e0b4217dc3 100644 --- a/drivers/usb/musb/musb_udc.c +++ b/drivers/usb/musb/musb_udc.c @@ -640,8 +640,17 @@ static void musb_peri_ep0(void) static void musb_peri_rx_ep(unsigned int ep) { - u16 peri_rxcount = readw(&musbr->ep[ep].epN.rxcount); + u16 peri_rxcount; + u8 peri_rxcsr = readw(&musbr->ep[ep].epN.rxcsr); + if (!(peri_rxcsr & MUSB_RXCSR_RXPKTRDY)) { + if (debug_level > 0) + serial_printf("ERROR : %s %d without MUSB_RXCSR_RXPKTRDY set\n", + __PRETTY_FUNCTION__, ep); + return; + } + + peri_rxcount = readw(&musbr->ep[ep].epN.rxcount); if (peri_rxcount) { struct usb_endpoint_instance *endpoint; u32 length; |