linux-kernel - [PATCH] crypto: cavium/cpt: Fix couple of static checker errors

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Date:   Wed, 15 Feb 2017 12:42:19 +0000
From:   George Cherian <george.cherian@...ium.com>
To:     herbert@...dor.apana.org.au, davem@...emloft.net,
        dan.carpenter@...cle.com
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        George Cherian <george.cherian@...ium.com>
Subject: [PATCH] crypto: cavium/cpt: Fix couple of static checker errors

Fix the following smatch errors
cptvf_reqmanager.c:333 do_post_process() warn: variable dereferenced
before check 'cptvf'
cptvf_main.c:825 cptvf_remove() error: we previously assumed 'cptvf'
could be null

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: George Cherian <george.cherian@...ium.com>
---
 drivers/crypto/cavium/cpt/cptvf_main.c       | 4 +++-
 drivers/crypto/cavium/cpt/cptvf_reqmanager.c | 4 ++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/cavium/cpt/cptvf_main.c b/drivers/crypto/cavium/cpt/cptvf_main.c
index aac2966..e50872e 100644
--- a/drivers/crypto/cavium/cpt/cptvf_main.c
+++ b/drivers/crypto/cavium/cpt/cptvf_main.c
@@ -815,8 +815,10 @@ static void cptvf_remove(struct pci_dev *pdev)
 {
 	struct cpt_vf *cptvf = pci_get_drvdata(pdev);
 
-	if (!cptvf)
+	if (!cptvf) {
 		dev_err(&pdev->dev, "Invalid CPT-VF device\n");
+		return;
+	}
 
 	/* Convey DOWN to PF */
 	if (cptvf_send_vf_down(cptvf)) {
diff --git a/drivers/crypto/cavium/cpt/cptvf_reqmanager.c b/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
index 7f57f30..169e662 100644
--- a/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
+++ b/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
@@ -330,8 +330,8 @@ void do_post_process(struct cpt_vf *cptvf, struct cpt_info_buffer *info)
 {
 	struct pci_dev *pdev = cptvf->pdev;
 
-	if (!info || !cptvf) {
-		dev_err(&pdev->dev, "Input params are incorrect for post processing\n");
+	if (!info) {
+		dev_err(&pdev->dev, "incorrect cpt_info_buffer for post processing\n");
 		return;
 	}
 
-- 
2.1.4