On 08/10/12 02:38, Julia Lawall wrote: > From: Julia Lawall <Julia.Lawall@xxxxxxx> > > Introduce use of I2c_MSG_READ/WRITE/OP, for readability. > > A length expressed as an explicit constant is also re-expressed as the size > of the buffer, when this is possible. > > The second case is simplified to use simple variables rather than arrays. > The variable b0 is dropped completely, and the variable reg that it > contains is used instead. The variable b1 is replaced by a u8-typed > variable named buf (the name used earlier in the file). The uses of b1 are > then adjusted accordingly. > > A simplified version of the semantic patch that makes this change is as > follows: (http://coccinelle.lip6.fr/) > > // <smpl> > @@ > expression a,b,c; > identifier x; > @@ > > struct i2c_msg x = > - {.addr = a, .buf = b, .len = c, .flags = I2C_M_RD} > + I2C_MSG_READ(a,b,c) > ; > > @@ > expression a,b,c; > identifier x; > @@ > > struct i2c_msg x = > - {.addr = a, .buf = b, .len = c, .flags = 0} > + I2C_MSG_WRITE(a,b,c) > ; > > @@ > expression a,b,c,d; > identifier x; > @@ > > struct i2c_msg x = > - {.addr = a, .buf = b, .len = c, .flags = d} > + I2C_MSG_OP(a,b,c,d) > ; > // </smpl> > > Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx> > > --- > > drivers/media/tuners/max2165.c | 13 ++++++------- > 1 file changed, 6 insertions(+), 7 deletions(-) > > diff --git a/drivers/media/tuners/max2165.c b/drivers/media/tuners/max2165.c > index ba84936..6638617 100644 > --- a/drivers/media/tuners/max2165.c > +++ b/drivers/media/tuners/max2165.c > @@ -47,7 +47,7 @@ static int max2165_write_reg(struct max2165_priv *priv, u8 reg, u8 data) > { > int ret; > u8 buf[] = { reg, data }; > - struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 }; > + struct i2c_msg msg = I2C_MSG_WRITE(0, buf, sizeof(buf)); > > msg.addr = priv->config->i2c_address; > > @@ -68,11 +68,10 @@ static int max2165_read_reg(struct max2165_priv *priv, u8 reg, u8 *p_data) > int ret; > u8 dev_addr = priv->config->i2c_address; > > - u8 b0[] = { reg }; > - u8 b1[] = { 0 }; > + u8 buf; > struct i2c_msg msg[] = { > - { .addr = dev_addr, .flags = 0, .buf = b0, .len = 1 }, > - { .addr = dev_addr, .flags = I2C_M_RD, .buf = b1, .len = 1 }, > + I2C_MSG_WRITE(dev_addr, ®, sizeof(reg)), > + I2C_MSG_READ(dev_addr, &buf, sizeof(buf)), > }; Not sure if the array changes should be done here or as a separate patch. Some of the other patches also have cases where single index arrays (both buffers and messages) could be converted. Should either convert all or none of them. I think its probably best to do as a separate series on top of this though. ~Ryan > > ret = i2c_transfer(priv->i2c, msg, 2); > @@ -81,10 +80,10 @@ static int max2165_read_reg(struct max2165_priv *priv, u8 reg, u8 *p_data) > return -EIO; > } > > - *p_data = b1[0]; > + *p_data = buf; > if (debug >= 2) > dprintk("%s: reg=0x%02X, data=0x%02X\n", > - __func__, reg, b1[0]); > + __func__, reg, buf); > return 0; > } > > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
