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Subject[RESEND/PATCH 4/6] USB: musb-gadget: fix DMA length for OUT transfer
Date
From: Ming Lei <tom.leiming@gmail.com>

DMA length should not go beyond the availabe space of request buffer,
so fix it.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Anand Gadiyar <gadiyar@ti.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Felipe Balbi <me@felipebalbi.com>
Cc: Anand Gadiyar <gadiyar@ti.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
---
drivers/usb/musb/musb_gadget.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 176e127..f3ee04f 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -659,10 +659,11 @@ static void rxstate(struct musb *musb, struct musb_request *req)
if (request->actual < request->length) {
int transfer_size = 0;
#ifdef USE_MODE1
- transfer_size = min(request->length,
+ transfer_size = min(request->length - request->actual,
channel->max_len);
#else
- transfer_size = len;
+ transfer_size = min(request->length - request->actual,
+ (unsigned)len);
#endif
if (transfer_size <= musb_ep->packet_sz)
musb_ep->dma->desired_mode = 0;
--
1.6.2.5


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