On Wed, 2016-12-14 at 20:14 -0800, Darren Hart wrote:
> linux-next reported in_tablet_mode and type may be used uninitialized
> after:
>
> b31800283868 ("platform/x86: thinkpad_acpi: Move tablet detection into
> separate function")
>
> This turns out to be a false positive as the pr_info call cannot be
> reached if tp_features.hotkey_tablet (global scope) is 0, and
> in_tablet_mode and type are assigned in both places
> tp_features.hotkey_tablet is assigned.
>
> Regardless, to make it explicit and avoid further reports, initialize
> in_tablet_mode to 0 and type to "".
>
@@ -3143,8 +3143,8 @@ typedef tpacpi_keymap_entry_t
> tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN];
>
> static int hotkey_init_tablet_mode(void)
> {
> - int in_tablet_mode, res;
> - char *type;
> + int in_tablet_mode = 0, res;
> + char *type = "";
Subtle correction
NULL will work either and takes less memory ;)
P.S. Even pr_*() is NULL-aware
>
> if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) {
> /* For X41t, X60t, X61t Tablets... */
> --
> 2.9.3
>
>
--
Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Intel Finland Oy
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