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ieee1394: fix NULL pointer dereference in sysfs access

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Regression since "ieee1394: prevent device binding of raw1394,
video1394, dv1394", commit d2ace29fa4:
$ cat /sys/bus/ieee1394/drivers/raw1394/device_ids
triggers a NULL pointer dereference in fw_show_drv_device_ids.
Reported by Miles Lane.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Tested-by: Miles Lane <miles.lane@gmail.com>
This commit is contained in:
Stefan Richter 2008-05-01 10:43:04 +02:00
parent e38649702e
commit 07c7224cf7
1 changed files with 4 additions and 1 deletions
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5
drivers/ieee1394/nodemgr.c
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@ -520,8 +520,11 @@ static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
char *scratch = buf;
driver = container_of(drv, struct hpsb_protocol_driver, driver);
id = driver->id_table;
if (!id)
return 0;
for (id = driver->id_table; id->match_flags != 0; id++) {
for (; id->match_flags != 0; id++) {
int need_coma = 0;
if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {