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| author | Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> | 2014-05-17 19:20:57 +0200 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-05-20 10:56:00 +1000 |
| commit | bd0c30e310d43c49debe380e344307b677e182a6 (patch) | |
| tree | 72a0f45acd4f89842640fdc7eb32a838c8fb4123 | |
| parent | 1efc563865dbc3710c5af7bc1540360a6d06192c (diff) | |
| download | linux-bd0c30e310d43c49debe380e344307b677e182a6.tar.bz2 | |
macintosh/windfarm_pm121.c: Fix for possible null pointer dereference
There is otherwise a risk of a possible null pointer dereference.
Was largely found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | drivers/macintosh/windfarm_pm121.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/macintosh/windfarm_pm121.c b/drivers/macintosh/windfarm_pm121.c index 7fe58b0ae8b4..b350fb86ff08 100644 --- a/drivers/macintosh/windfarm_pm121.c +++ b/drivers/macintosh/windfarm_pm121.c @@ -555,8 +555,18 @@ static void pm121_create_sys_fans(int loop_id) pid_param.interval = PM121_SYS_INTERVAL; pid_param.history_len = PM121_SYS_HISTORY_SIZE; pid_param.itarget = param->itarget; - pid_param.min = control->ops->get_min(control); - pid_param.max = control->ops->get_max(control); + if(control) + { + pid_param.min = control->ops->get_min(control); + pid_param.max = control->ops->get_max(control); + } else { + /* + * This is probably not the right!? + * Perhaps goto fail if control == NULL above? + */ + pid_param.min = 0; + pid_param.max = 0; + } wf_pid_init(&pm121_sys_state[loop_id]->pid, &pid_param); @@ -571,7 +581,7 @@ static void pm121_create_sys_fans(int loop_id) control the same control */ printk(KERN_WARNING "pm121: failed to set up %s loop " "setting \"%s\" to max speed.\n", - loop_names[loop_id], control->name); + loop_names[loop_id], control ? control->name : "uninitialized value"); if (control) wf_control_set_max(control); |