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ieee1394: dv1394: fix CardBus card ejection 

Fix NULL pointer dereference on hot ejection of a FireWire card while
dv1394 was loaded.  http://bugzilla.kernel.org/show_bug.cgi?id=7121
I did not test card ejection with open /dev/dv1394 files yet.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2007-01-27 13:52:52 +01:00
parent beb2fdcad1
commit 88e7bf2a4c
1 changed files with 5 additions and 7 deletions
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12
drivers/ieee1394/dv1394.c
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@ -2267,11 +2267,7 @@ static void dv1394_remove_host (struct hpsb_host *host)
{ {
struct video_card *video; struct video_card *video;
unsigned long flags; unsigned long flags;
int id = host->id; int id = host->id, found_ohci_card = 0;
/* We only work with the OHCI-1394 driver */
if (strcmp(host->driver->name, OHCI1394_DRIVER_NAME))
return;
/* find the corresponding video_cards */ /* find the corresponding video_cards */
do { do {
@ -2284,6 +2280,7 @@ static void dv1394_remove_host (struct hpsb_host *host)
if ((tmp_vid->id >> 2) == id) { if ((tmp_vid->id >> 2) == id) {
list_del(&tmp_vid->list); list_del(&tmp_vid->list);
video = tmp_vid; video = tmp_vid;
found_ohci_card = 1;
break; break;
} }
} }
@ -2293,8 +2290,9 @@ static void dv1394_remove_host (struct hpsb_host *host)
dv1394_un_init(video); dv1394_un_init(video);
} while (video != NULL); } while (video != NULL);
class_device_destroy(hpsb_protocol_class, if (found_ohci_card)
MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_DV1394 * 16 + (id<<2))); class_device_destroy(hpsb_protocol_class, MKDEV(IEEE1394_MAJOR,
IEEE1394_MINOR_BLOCK_DV1394 * 16 + (host->id << 2)));
} }
static void dv1394_add_host (struct hpsb_host *host) static void dv1394_add_host (struct hpsb_host *host)