linux-kernel - [PATCH 13/13] coresight: cti: Remove unnecessary NULL check in cti_sig_type

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Message-Id: <20200309161748.31975-14-mathieu.poirier@linaro.org>
Date:   Mon,  9 Mar 2020 10:17:48 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     gregkh@...uxfoundation.org
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 13/13] coresight: cti: Remove unnecessary NULL check in cti_sig_type_name

From: Nathan Chancellor <natechancellor@...il.com>

Clang warns:

drivers/hwtracing/coresight/coresight-cti-sysfs.c:948:11: warning:
address of array 'grp->sig_types' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        if (grp->sig_types) {
        ~~  ~~~~~^~~~~~~~~
1 warning generated.

sig_types is at the end of a struct so it cannot be NULL.

Fixes: 85b6684eab65 ("coresight: cti: Add connection information to sysfs")
Link: https://github.com/ClangBuiltLinux/linux/issues/914
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
Reported-by: kbuild test robot <lkp@...el.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
 drivers/hwtracing/coresight/coresight-cti-sysfs.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-cti-sysfs.c b/drivers/hwtracing/coresight/coresight-cti-sysfs.c
index abb7f492c2cb..214d6552b494 100644
--- a/drivers/hwtracing/coresight/coresight-cti-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-cti-sysfs.c
@@ -945,10 +945,8 @@ cti_sig_type_name(struct cti_trig_con *con, int used_count, bool in)
 	int idx = 0;
 	struct cti_trig_grp *grp = in ? con->con_in : con->con_out;
 
-	if (grp->sig_types) {
-		if (used_count < grp->nr_sigs)
-			idx = grp->sig_types[used_count];
-	}
+	if (used_count < grp->nr_sigs)
+		idx = grp->sig_types[used_count];
 	return sig_type_names[idx];
 }
 
-- 
2.20.1