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i2c: iproc: Fix shifting 31 bits 

Fix undefined behaviour in the iProc I2C driver by using 'BIT' marcro.

Reported-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
[wsa: in commit msg, don't say 'checkpatch' but name the issue]
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Ray Jui 2020-08-14 15:40:08 -07:00 committed by Wolfram Sang
parent 914a7b3563
commit 0204081128
1 changed files with 2 additions and 2 deletions
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4
drivers/i2c/busses/i2c-bcm-iproc.c
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@ -720,7 +720,7 @@ static int bcm_iproc_i2c_xfer_internal(struct bcm_iproc_i2c_dev *iproc_i2c,
/* mark the last byte */
if (!process_call && (i == msg->len - 1))
val |= 1 << M_TX_WR_STATUS_SHIFT;
val |= BIT(M_TX_WR_STATUS_SHIFT);
iproc_i2c_wr_reg(iproc_i2c, M_TX_OFFSET, val);
}
@ -738,7 +738,7 @@ static int bcm_iproc_i2c_xfer_internal(struct bcm_iproc_i2c_dev *iproc_i2c,
*/
addr = i2c_8bit_addr_from_msg(msg);
/* mark it the last byte out */
val = addr | (1 << M_TX_WR_STATUS_SHIFT);
val = addr | BIT(M_TX_WR_STATUS_SHIFT);
iproc_i2c_wr_reg(iproc_i2c, M_TX_OFFSET, val);
}