diff options
| author | Francois Gervais <fgervais@distech-controls.com> | 2021-03-11 00:10:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-26 13:06:57 +0300 |
| commit | 0296c9057adee577bf53f7e91f6b1178e23aeb44 (patch) | |
| tree | 03b447733f89b44b1de2e524b75c0fce51d888c6 /drivers/rtc/rtc-pcf85063.c | |
| parent | 7b994b03f1de4475dc261a0ff057751fdd0d2bfa (diff) | |
| download | linux-0296c9057adee577bf53f7e91f6b1178e23aeb44.tar.xz | |
rtc: pcf85063: fallback to parent of_node
commit 03531606ef4cda25b629f500d1ffb6173b805c05 upstream.
The rtc device node is always NULL.
Since v5.12-rc1-dontuse/3c9ea42802a1fbf7ef29660ff8c6e526c58114f6 this
will lead to a NULL pointer dereference.
To fix this use the parent node which is the i2c client node as set by
devm_rtc_allocate_device().
Using the i2c client node seems to be what other similar drivers do
e.g. rtc-pcf8563.c.
Signed-off-by: Francois Gervais <fgervais@distech-controls.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210310211026.27299-1-fgervais@distech-controls.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/rtc/rtc-pcf85063.c')
| -rw-r--r-- | drivers/rtc/rtc-pcf85063.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c index f8b99cb72959..62684ca3a665 100644 --- a/drivers/rtc/rtc-pcf85063.c +++ b/drivers/rtc/rtc-pcf85063.c @@ -486,6 +486,7 @@ static struct clk *pcf85063_clkout_register_clk(struct pcf85063 *pcf85063) { struct clk *clk; struct clk_init_data init; + struct device_node *node = pcf85063->rtc->dev.parent->of_node; init.name = "pcf85063-clkout"; init.ops = &pcf85063_clkout_ops; @@ -495,15 +496,13 @@ static struct clk *pcf85063_clkout_register_clk(struct pcf85063 *pcf85063) pcf85063->clkout_hw.init = &init; /* optional override of the clockname */ - of_property_read_string(pcf85063->rtc->dev.of_node, - "clock-output-names", &init.name); + of_property_read_string(node, "clock-output-names", &init.name); /* register the clock */ clk = devm_clk_register(&pcf85063->rtc->dev, &pcf85063->clkout_hw); if (!IS_ERR(clk)) - of_clk_add_provider(pcf85063->rtc->dev.of_node, - of_clk_src_simple_get, clk); + of_clk_add_provider(node, of_clk_src_simple_get, clk); return clk; } |