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usb: renesas_usbhs: care buff alignment when dma handler
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Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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Kuninori Morimoto authored and Greg Kroah-Hartman committed Jul 8, 2011
1 parent 8d48fdf commit 9a12d09
Showing 1 changed file with 6 additions and 0 deletions.
6 changes: 6 additions & 0 deletions drivers/usb/renesas_usbhs/fifo.c
Original file line number Diff line number Diff line change
Expand Up @@ -642,6 +642,9 @@ static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
if (len % 4) /* 32bit alignment */
goto usbhsf_pio_prepare_push;

if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
goto usbhsf_pio_prepare_push;

/* get enable DMA fifo */
fifo = usbhsf_get_dma_fifo(priv, pkt);
if (!fifo)
Expand Down Expand Up @@ -716,6 +719,9 @@ static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
if (!fifo)
goto usbhsf_pio_prepare_pop;

if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
goto usbhsf_pio_prepare_pop;

ret = usbhsf_fifo_select(pipe, fifo, 0);
if (ret < 0)
goto usbhsf_pio_prepare_pop;
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