media: atomisp: fix uninitialized bug in gmin_get_pmic_id_and_addr()

stable inclusion
from stable-v5.10.94
commit 8d132d9dd8bae9f2d5ff153b3fe6eb31a000fe39
bugzilla: https://gitee.com/openeuler/kernel/issues/I531X9

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8d132d9dd8bae9f2d5ff153b3fe6eb31a000fe39

--------------------------------

[ Upstream commit cb4d67a9 ]

The "power" pointer is not initialized on the else path and that would
lead to an Oops.

Link: https://lore.kernel.org/linux-media/20211012082150.GA31086@kili
Fixes: c30f4cb2 ("media: atomisp: Refactor PMIC detection to a separate function")
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NKieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c

@@ -481,7 +481,7 @@ static int atomisp_get_acpi_power(struct device *dev)
 
 static u8 gmin_get_pmic_id_and_addr(struct device *dev)
 {
-	struct i2c_client *power;
+	struct i2c_client *power = NULL;
 	static u8 pmic_i2c_addr;
 
 	if (pmic_id)