From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-i2c@vger.kernel.org
Cc: Thor Thayer <thor.thayer@linux.intel.com>,
linux-renesas-soc@vger.kernel.org,
Wolfram Sang <wsa+renesas@sang-engineering.com>
Subject: [PATCH] i2c: altera: use proper variable to hold errno
Date: Fri, 27 Mar 2020 23:28:26 +0100 [thread overview]
Message-ID: <20200327222826.10207-1-wsa+renesas@sang-engineering.com> (raw)
device_property_read_u32() returns errno or 0, so we should use the
integer variable 'ret' and not the u32 'val' to hold the retval.
Fixes: 0560ad576268 ("i2c: altera: Add Altera I2C Controller driver")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
Found while trying to refactor code handling "clock-frequency" property.
drivers/i2c/busses/i2c-altera.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/i2c/busses/i2c-altera.c b/drivers/i2c/busses/i2c-altera.c
index 1de23b4f3809..92d2c706c2a7 100644
--- a/drivers/i2c/busses/i2c-altera.c
+++ b/drivers/i2c/busses/i2c-altera.c
@@ -384,7 +384,6 @@ static int altr_i2c_probe(struct platform_device *pdev)
struct altr_i2c_dev *idev = NULL;
struct resource *res;
int irq, ret;
- u32 val;
idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL);
if (!idev)
@@ -411,17 +410,17 @@ static int altr_i2c_probe(struct platform_device *pdev)
init_completion(&idev->msg_complete);
spin_lock_init(&idev->lock);
- val = device_property_read_u32(idev->dev, "fifo-size",
+ ret = device_property_read_u32(idev->dev, "fifo-size",
&idev->fifo_size);
- if (val) {
+ if (ret) {
dev_err(&pdev->dev, "FIFO size set to default of %d\n",
ALTR_I2C_DFLT_FIFO_SZ);
idev->fifo_size = ALTR_I2C_DFLT_FIFO_SZ;
}
- val = device_property_read_u32(idev->dev, "clock-frequency",
+ ret = device_property_read_u32(idev->dev, "clock-frequency",
&idev->bus_clk_rate);
- if (val) {
+ if (ret) {
dev_err(&pdev->dev, "Default to 100kHz\n");
idev->bus_clk_rate = 100000; /* default clock rate */
}
--
2.20.1
next reply other threads:[~2020-03-27 22:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-27 22:28 Wolfram Sang [this message]
2020-04-01 21:00 ` [PATCH] i2c: altera: use proper variable to hold errno Thor Thayer
2020-04-09 14:00 ` Wolfram Sang
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