From: Dan Carpenter <dan.carpenter@oracle.com>
To: Sebastian Reichel <sre@kernel.org>,
Karl-Heinz Schneider <karl-heinz@schneider-inet.de>
Cc: linux-pm@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] power: supply: sbs-message: double left shift bug in sbsm_select()
Date: Tue, 7 Nov 2017 15:43:22 +0300 [thread overview]
Message-ID: <20171107124322.mm3fqkrggw3zidrx@mwanda> (raw)
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>
---
>From static analysis. Not tested.
diff --git a/drivers/power/supply/sbs-manager.c b/drivers/power/supply/sbs-manager.c
index ccb4217b9638..cb6e8f66c7a2 100644
--- 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_core *muxc, u32 chan)
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);
next reply other threads:[~2017-11-07 12:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-07 12:43 Dan Carpenter [this message]
2017-11-07 15:18 ` [PATCH] power: supply: sbs-message: double left shift bug in sbsm_select() Phil Reid
2017-11-13 10:55 ` Sebastian Reichel
2017-11-13 11:02 ` Wolfram Sang
2017-11-15 7:45 ` Wolfram Sang
2017-11-15 10:05 ` Sebastian Reichel
2017-12-01 15:27 ` Sebastian Reichel
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