From 4838b7e04451e425895c77f462ae1a70d6d3ff62 Mon Sep 17 00:00:00 2001
From: Sanjeev Premi <premi@ti.com>
Date: Mon, 11 Jul 2011 20:50:31 +0530
Subject: [PATCH] mfd: Fix mismatch in twl4030 mutex lock-unlock
commit e178ccb33569da17dc897a08a3865441b813bdfb upstream.
A mutex is locked on entry into twl4030_madc_conversion().
Immediate return on some error conditions leaves the
mutex locked.
This patch ensures that mutex is always unlocked before
leaving the function.
Signed-off-by: Sanjeev Premi <premi@ti.com>
Cc: Keerthy <j-keerthy@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/mfd/twl4030-madc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/mfd/twl4030-madc.c b/drivers/mfd/twl4030-madc.c
index 3941ddcf15fe..b5d598c3aa71 100644
--- a/drivers/mfd/twl4030-madc.c
+++ b/drivers/mfd/twl4030-madc.c
@@ -530,13 +530,13 @@ int twl4030_madc_conversion(struct twl4030_madc_request *req)
if (ret) {
dev_err(twl4030_madc->dev,
"unable to write sel register 0x%X\n", method->sel + 1);
- return ret;
+ goto out;
}
ret = twl_i2c_write_u8(TWL4030_MODULE_MADC, ch_lsb, method->sel);
if (ret) {
dev_err(twl4030_madc->dev,
"unable to write sel register 0x%X\n", method->sel + 1);
- return ret;
+ goto out;
}
/* Select averaging for all channels if do_avg is set */
if (req->do_avg) {
@@ -546,7 +546,7 @@ int twl4030_madc_conversion(struct twl4030_madc_request *req)
dev_err(twl4030_madc->dev,
"unable to write avg register 0x%X\n",
method->avg + 1);
- return ret;
+ goto out;
}
ret = twl_i2c_write_u8(TWL4030_MODULE_MADC,
ch_lsb, method->avg);
@@ -554,7 +554,7 @@ int twl4030_madc_conversion(struct twl4030_madc_request *req)
dev_err(twl4030_madc->dev,
"unable to write sel reg 0x%X\n",
method->sel + 1);
- return ret;
+ goto out;
}
}
if (req->type == TWL4030_MADC_IRQ_ONESHOT && req->func_cb != NULL) {
--
2.34.1