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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 <shimoda.yoshihiro@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Yoshihiro Shimoda 2007-05-30 20:42:41 +09:00 committed by Greg Kroah-Hartman
parent 5d3043586d
commit f6ace2c99a
1 changed files with 4 additions and 1 deletions
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5
drivers/usb/host/r8a66597-hcd.c
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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));
}