| Message ID | 20210208132749.97738-1-jacopo+renesas@jmondi.org (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Kieran Bingham |
| Headers | show |
| Series | media: i2c: rdamc21: Fix warning on u8 cast | expand |
Hello, On Mon, Feb 08, 2021 at 02:27:49PM +0100, Jacopo Mondi wrote: > Sparse reports a warning on a cast to u8 of a 16 bits constant. > > drivers/media/i2c/rdacm21.c:348:62: warning: cast truncates bits > from constant value (300a becomes a) > > Even if the behaviour is intended, silence the sparse warning replacing > the cast with a bitwise & operation. > > Fixes: a59f853b3b4b ("media: i2c: Add driver for RDACM21 camera module") > Reported-by: Hans Verkuil <hverkuil@xs4all.nl> > Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org> I don't see this last fix for this window collected in the most recent media tree. Is it too late already ? It's really a trivial fix but silences a sparse warning, so it might be worth collecting it ? Thanks j > --- > drivers/media/i2c/rdacm21.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/media/i2c/rdacm21.c b/drivers/media/i2c/rdacm21.c > index dcc21515e5a4..179d107f494c 100644 > --- a/drivers/media/i2c/rdacm21.c > +++ b/drivers/media/i2c/rdacm21.c > @@ -345,7 +345,7 @@ static int ov10640_initialize(struct rdacm21_device *dev) > /* Read OV10640 ID to test communications. */ > ov490_write_reg(dev, OV490_SCCB_SLAVE0_DIR, OV490_SCCB_SLAVE_READ); > ov490_write_reg(dev, OV490_SCCB_SLAVE0_ADDR_HIGH, OV10640_CHIP_ID >> 8); > - ov490_write_reg(dev, OV490_SCCB_SLAVE0_ADDR_LOW, (u8)OV10640_CHIP_ID); > + ov490_write_reg(dev, OV490_SCCB_SLAVE0_ADDR_LOW, OV10640_CHIP_ID & 0xff); > > /* Trigger SCCB slave transaction and give it some time to complete. */ > ov490_write_reg(dev, OV490_HOST_CMD, OV490_HOST_CMD_TRIGGER); > -- > 2.30.0 >
diff --git a/drivers/media/i2c/rdacm21.c b/drivers/media/i2c/rdacm21.c index dcc21515e5a4..179d107f494c 100644 --- a/drivers/media/i2c/rdacm21.c +++ b/drivers/media/i2c/rdacm21.c @@ -345,7 +345,7 @@ static int ov10640_initialize(struct rdacm21_device *dev) /* Read OV10640 ID to test communications. */ ov490_write_reg(dev, OV490_SCCB_SLAVE0_DIR, OV490_SCCB_SLAVE_READ); ov490_write_reg(dev, OV490_SCCB_SLAVE0_ADDR_HIGH, OV10640_CHIP_ID >> 8); - ov490_write_reg(dev, OV490_SCCB_SLAVE0_ADDR_LOW, (u8)OV10640_CHIP_ID); + ov490_write_reg(dev, OV490_SCCB_SLAVE0_ADDR_LOW, OV10640_CHIP_ID & 0xff); /* Trigger SCCB slave transaction and give it some time to complete. */ ov490_write_reg(dev, OV490_HOST_CMD, OV490_HOST_CMD_TRIGGER);
Sparse reports a warning on a cast to u8 of a 16 bits constant. drivers/media/i2c/rdacm21.c:348:62: warning: cast truncates bits from constant value (300a becomes a) Even if the behaviour is intended, silence the sparse warning replacing the cast with a bitwise & operation. Fixes: a59f853b3b4b ("media: i2c: Add driver for RDACM21 camera module") Reported-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org> --- drivers/media/i2c/rdacm21.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.30.0