From: Ming Lei <tom.leim...@gmail.com>
DMA length should not go beyond the availabe space of request buffer,
so fix it.
Signed-off-by: Ming Lei <tom.leim...@gmail.com>
Cc: David Brownell <dbrown...@users.sourceforge.net>
Cc: Felipe Balbi <m...@felipebalbi.com>
Cc: Anand Gadiyar <gadi...@ti.com>
Cc: Mike Frysinger <vap...@gentoo.org>
Cc: Sergei Shtylyov <sshtyl...@ru.mvista.com>
---
drivers/usb/musb/musb_gadget.c | 18 +++++++++---------
1 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index fa826f9..cacae96 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -300,6 +300,11 @@ static void txstate(struct musb *musb, struct musb_request
*req)
#ifndef CONFIG_MUSB_PIO_ONLY
if (is_dma_capable() && musb_ep->dma) {
struct dma_controller *c = musb->dma_controller;
+ size_t request_size;
+
+ /* setup DMA, then program endpoint CSR */
+ request_size = min_t(size_t, request->length - request->actual,
+ musb_ep->dma->max_len);
use_dma = (request->dma != DMA_ADDR_INVALID);
@@ -307,11 +312,6 @@ static void txstate(struct musb *musb, struct musb_request
*req)
#ifdef CONFIG_USB_INVENTRA_DMA
{
- size_t request_size;
-
- /* setup DMA, then program endpoint CSR */
- request_size = min_t(size_t, request->length,
- musb_ep->dma->max_len);
if (request_size < musb_ep->packet_sz)
musb_ep->dma->desired_mode = 0;
else
@@ -373,8 +373,8 @@ static void txstate(struct musb *musb, struct musb_request
*req)
use_dma = use_dma && c->channel_program(
musb_ep->dma, musb_ep->packet_sz,
0,
- request->dma,
- request->length);
+ request->dma + request->actual,
+ request_size);
if (!use_dma) {
c->channel_release(musb_ep->dma);
musb_ep->dma = NULL;
@@ -386,8 +386,8 @@ static void txstate(struct musb *musb, struct musb_request
*req)
use_dma = use_dma && c->channel_program(
musb_ep->dma, musb_ep->packet_sz,
request->zero,
- request->dma,
- request->length);
+ request->dma + request->actual,
+ request_size);
#endif
}
#endif
--
1.6.2.5
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