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usb: gadget: renesas_usbhs: disable pipe on top of interrupt

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When data read interrupt happened, the pipe is BUF which means "enable".
then, next un-necessary interrupt/token might be
issued again when all data were popped from fifo.
It will cause un-understandable bug.
This patch decides pipe disable on top of read interrupt.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Kuninori Morimoto 2011-10-10 22:05:51 -07:00 committed by Felipe Balbi
parent 6e6db82ba9
commit 6ff5d09bd2
1 changed files with 14 additions and 9 deletions
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23
drivers/usb/renesas_usbhs/fifo.c
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@ -475,6 +475,20 @@ static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
len = min(len, rcv_len);
total_len = len;
/*
* update actual length first here to decide disable pipe.
* if this pipe keeps BUF status and all data were popped,
* then, next interrupt/token will be issued again
*/
pkt->actual += total_len;
if ((pkt->actual == pkt->length) || /* receive all data */
(total_len < maxp)) { /* short packet */
*is_done = 1;
usbhsf_rx_irq_ctrl(pipe, 0);
usbhs_pipe_disable(pipe); /* disable pipe first */
}
/*
* Buffer clear if Zero-Length packet
*
@ -505,16 +519,7 @@ static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
buf[i] = (data >> ((i & 0x03) * 8)) & 0xff;
}
pkt->actual += total_len;
usbhs_fifo_read_end:
if ((pkt->actual == pkt->length) || /* receive all data */
(total_len < maxp)) { /* short packet */
*is_done = 1;
usbhsf_rx_irq_ctrl(pipe, 0);
usbhs_pipe_disable(pipe);
}
dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n",
usbhs_pipe_number(pipe),
pkt->length, pkt->actual, *is_done, pkt->zero);