[media] saa717x: fix multi-byte read code
As reported by smatch:
drivers/media/i2c/saa717x.c:155 saa717x_read() warn: mask and shift to zero
drivers/media/i2c/saa717x.c:155 saa717x_read() warn: mask and shift to zero
This is done right at saa717x_write(), but the read function is
broken. Thankfully, there's just one place at saa717x driver that
uses multibyte read (for status report, via printk).
Yet, let's fix it. From saa717x_write(), it is clear that the
bytes are in little endian:
mm1[4] = (value >> 16) & 0xff;
mm1[3] = (value >> 8) & 0xff;
mm1[2] = value & 0xff;
So, the same order should be valid for read too.
Compile-tested only.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/drivers/media/i2c/saa717x.c b/drivers/media/i2c/saa717x.c
index 0d0f9a9..17557b2 100644
--- a/drivers/media/i2c/saa717x.c
+++ b/drivers/media/i2c/saa717x.c
@@ -152,9 +152,9 @@
i2c_transfer(adap, msgs, 2);
if (fw_addr)
- value = (mm2[2] & 0xff) | ((mm2[1] & 0xff) >> 8) | ((mm2[0] & 0xff) >> 16);
+ value = (mm2[2] << 16) | (mm2[1] << 8) | mm2[0];
else
- value = mm2[0] & 0xff;
+ value = mm2[0];
v4l2_dbg(2, debug, sd, "read: reg 0x%03x=0x%08x\n", reg, value);
return value;