[PATCH 4.15 069/128] power: supply: sbs-message: double left shift bug in sbsm_select()

Greg Kroah-Hartman
2018-03-16T15:23:30Z

From: Dan Carpenter <dan.carpenter@oracle.com>

[ Upstream commit 7d54d0d38ec42559c891526f079f1e035cd4b3ae ]

The original code does this: "1 << (1 << 11)" which is undefined in C.

Fixes: dbc4deda03fe ("power: Adds support for Smart Battery System Manager")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/power/supply/sbs-manager.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/power/supply/sbs-manager.c
+++ b/drivers/power/supply/sbs-manager.c
@@ -183,7 +183,7 @@ static int sbsm_select(struct i2c_mux_co
return ret;

/* chan goes from 1 ... 4 */
- reg = 1 << BIT(SBSM_SMB_BAT_OFFSET + chan);
+ reg = BIT(SBSM_SMB_BAT_OFFSET + chan);
ret = sbsm_write_word(data->client, SBSM_CMD_BATSYSSTATE, reg);
if (ret)
dev_err(dev, "Failed to select channel %i\n", chan);