[PATCH] ata: sata_fsl: fix sscanf() and sysfs_emit() format strings

[Damien Le Moal]

Use the %u format for unsigned int parameters handling with sscanf() and
sysfs_emit() to avoid compilation warnings. In
fsl_sata_rx_watermark_store(), the call to sscanf() to parse a single
argument is replaced with a call to kstrtouint().

While at it, also replace the printk(KERN_ERR) calls with dev_err()
calls and fix blank lines in fsl_sata_rx_watermark_store().

Reported-by: kernel test robot <l...@intel.com>
Signed-off-by: Damien Le Moal <damien.lem...@opensource.wdc.com>
---
 drivers/ata/sata_fsl.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index da0152116d9f..556034a15430 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -322,7 +322,7 @@ static void fsl_sata_set_irq_coalescing(struct ata_host 
*host,
 static ssize_t fsl_sata_intr_coalescing_show(struct device *dev,
                struct device_attribute *attr, char *buf)
 {
-       return sysfs_emit(buf, "%d      %d\n",
+       return sysfs_emit(buf, "%u      %u\n",
                        intr_coalescing_count, intr_coalescing_ticks);
 }
 
@@ -332,10 +332,8 @@ static ssize_t fsl_sata_intr_coalescing_store(struct 
device *dev,
 {
        unsigned int coalescing_count,  coalescing_ticks;
 
-       if (sscanf(buf, "%d%d",
-                               &coalescing_count,
-                               &coalescing_ticks) != 2) {
-               printk(KERN_ERR "fsl-sata: wrong parameter format.\n");
+       if (sscanf(buf, "%u%u", &coalescing_count, &coalescing_ticks) != 2) {
+               dev_err(dev, "fsl-sata: wrong parameter format.\n");
                return -EINVAL;
        }
 
@@ -359,7 +357,7 @@ static ssize_t fsl_sata_rx_watermark_show(struct device 
*dev,
        rx_watermark &= 0x1f;
        spin_unlock_irqrestore(&host->lock, flags);
 
-       return sysfs_emit(buf, "%d\n", rx_watermark);
+       return sysfs_emit(buf, "%u\n", rx_watermark);
 }
 
 static ssize_t fsl_sata_rx_watermark_store(struct device *dev,
@@ -373,8 +371,8 @@ static ssize_t fsl_sata_rx_watermark_store(struct device 
*dev,
        void __iomem *csr_base = host_priv->csr_base;
        u32 temp;
 
-       if (sscanf(buf, "%d", &rx_watermark) != 1) {
-               printk(KERN_ERR "fsl-sata: wrong parameter format.\n");
+       if (kstrtouint(buf, 10, &rx_watermark) < 0) {
+               dev_err(dev, "fsl-sata: wrong parameter format.\n");
                return -EINVAL;
        }
 
@@ -382,8 +380,8 @@ static ssize_t fsl_sata_rx_watermark_store(struct device 
*dev,
        temp = ioread32(csr_base + TRANSCFG);
        temp &= 0xffffffe0;
        iowrite32(temp | rx_watermark, csr_base + TRANSCFG);
-
        spin_unlock_irqrestore(&host->lock, flags);
+
        return strlen(buf);
 }
 
-- 
2.34.1