[patch 14/22] USB: SN9C10x driver - bad page state fix

From: Greg Kroah-Hartman (gregkh_at_suse.de)
Date: 11/24/05

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    Date:	Wed, 23 Nov 2005 15:45:17 -0800
To: Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>

    From: Damian Wrobel <dwrobel@ertel.com.pl>

    This patch solves the following problem I've already discovered on the
    latest 2.6.15-rc1-git1 kernel:

    Nov 13 07:37:28 wrobel kernel: Bad page state at free_hot_cold_page (in process 'motion', page c164e020)
    Nov 13 07:37:28 wrobel kernel: flags:0x40000400 mapping:00000000 mapcount:0 count:0
    Nov 13 07:37:28 wrobel kernel: Backtrace:
    Nov 13 07:37:28 wrobel kernel: [<c0146d86>] bad_page+0x85/0xbe
    Nov 13 07:37:28 wrobel kernel: [<c0147629>] free_hot_cold_page+0x54/0x129
    Nov 13 07:37:28 wrobel kernel: [<c01598c6>] __vunmap+0xa9/0xfe
    Nov 13 07:37:28 wrobel kernel: [<c0154114>] vmalloc_to_page+0x34/0x55
    Nov 13 07:37:28 wrobel kernel: [<c0159942>] vfree+0x27/0x35
    Nov 13 07:37:28 wrobel kernel: [<f8a20292>] sn9c102_release_buffers+0x30/0x3f [sn9c102]
    Nov 13 07:37:28 wrobel kernel: [<f8a231c2>] sn9c102_release+0x37/0xeb [sn9c102]
    Nov 13 07:37:28 wrobel kernel: [<c0163e74>] __fput+0xa9/0x1aa
    Nov 13 07:37:28 wrobel kernel: [<c01624f7>] filp_close+0x49/0x6d
    Nov 13 07:37:30 wrobel kernel: [<c016258f>] sys_close+0x74/0x95
    Nov 13 07:37:30 wrobel kernel: [<c0102ef9>] syscall_call+0x7/0xb
    Nov 13 07:37:31 wrobel kernel: Trying to fix it up, but a reboot is needed

    Signed-off-by: Damian Wrobel <dwrobel@ertel.com.pl>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 

    ---
 drivers/usb/media/sn9c102_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
--- usb-2.6.orig/drivers/usb/media/sn9c102_core.c
+++ usb-2.6/drivers/usb/media/sn9c102_core.c
@@ -199,7 +199,7 @@ static void sn9c102_release_buffers(stru
 {
 	if (cam->nbuffers) {
 		rvfree(cam->frame[0].bufmem,
-		       cam->nbuffers * cam->frame[0].buf.length);
+		       cam->nbuffers * PAGE_ALIGN(cam->frame[0].buf.length));
 		cam->nbuffers = 0;
 	}
 }
--
-
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