[PATCH] coresight: Fix dsb_mode_store() unsigned val is never less than zero

[Pei Xiao]

dsb_mode_store() warn: unsigned 'val' is never less than zero.

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202410150702.UaZ7kvet-lkp@xxxxxxxxx/
Fixes: 018e43ad1eee ("coresight-tpdm: Add node to set dsb programming mode")
Signed-off-by: Pei Xiao <xiaopei01@xxxxxxxxxx>
---
 drivers/hwtracing/coresight/coresight-tpdm.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c
index b7d99e91ab84..158950243d83 100644
--- a/drivers/hwtracing/coresight/coresight-tpdm.c
+++ b/drivers/hwtracing/coresight/coresight-tpdm.c
@@ -640,8 +640,7 @@ static ssize_t dsb_mode_store(struct device *dev,
 	struct tpdm_drvdata *drvdata = dev_get_drvdata(dev->parent);
 	unsigned long val;
 
-	if ((kstrtoul(buf, 0, &val)) || (val < 0) ||
-			(val & ~TPDM_DSB_MODE_MASK))
+	if ((kstrtoul(buf, 0, &val)) || (val & ~TPDM_DSB_MODE_MASK))
 		return -EINVAL;
 
 	spin_lock(&drvdata->spinlock);
-- 
2.34.1