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List:       linux-usb-devel
Subject:    [linux-usb-devel] [patch 2.6.22-rc2-mm1] r8a66597-hcd: fix NULL
From:       Yoshihiro Shimoda <shimoda.yoshihiro () renesas ! com>
Date:       2007-05-30 11:42:41
Message-ID: 465D6331.9070302 () renesas ! com
[Download RAW message or body]

This patch fixes the problem that accesses NULL pointer
when disconnected a cable while play music with usb-speaker.

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
---
 drivers/usb/host/r8a66597-hcd.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/usb/host/r8a66597-hcd.c.orig	2007-05-30 18:06:48.000000000 +0900
+++ a/drivers/usb/host/r8a66597-hcd.c	2007-05-30 17:55:37.000000000 +0900
@@ -47,7 +47,7 @@ MODULE_DESCRIPTION("R8A66597 USB Host Co
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Yoshihiro Shimoda");

-#define DRIVER_VERSION	"9 May 2007"
+#define DRIVER_VERSION	"29 May 2007"

 static const char hcd_name[] = "r8a66597_hcd";

@@ -544,6 +544,9 @@ static void pipe_toggle_restore(struct r
 	unsigned char endpoint = usb_pipeendpoint(urb->pipe);
 	unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);

+	if (!toggle)
+		return;
+
 	r8a66597_pipe_toggle(r8a66597, pipe, *toggle & (1 << endpoint));
 }


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