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USB: r8a66597-hcd: fix NULL access

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

Signed-off-by: Yoshihiro Shimoda <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Yoshihiro Shimoda authored and Greg Kroah-Hartman committed 2007-07-12 16:29:45 -07:00
1 parent 5d3043586d
commit f6ace2c99a
1 file changed
+4 -1
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drivers/usb/host/r8a66597-hcd.c
+4 -1
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@@ -47,7 +47,7 @@ MODULE_DESCRIPTION("R8A66597 USB Host Controller Driver");
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 r8a66597 *r8a66597,
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));
}