All of lore.kernel.org
 help / color / mirror / Atom feed
From: Vaishali Thakkar <vaishali.thakkar@oracle.com>
To: airlied@linux.ie
Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	Vaishali Thakkar <vaishali.thakkar@oracle.com>
Subject: [PATCH v2] drm/msm: Move call to PTR_ERR_OR_ZERO after reassignment
Date: Thu, 28 Apr 2016 18:52:49 +0530	[thread overview]
Message-ID: <1461849769-16780-1-git-send-email-vaishali.thakkar@oracle.com> (raw)

Here, a location is reset to NULL before being passed to PTR_ERR.
So, PTR_ERR should be called before its argument is reassigned
to NULL. Further to simplify things use PTR_ERR_OR_ZERO instead
of PTR_ERR and IS_ERR.

Problem found using Coccinelle.

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@oracle.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
---
Changes since v1:
	- No functional changes, just make two pr_err() to print
          the same format
---
 drivers/gpu/drm/msm/edp/edp_ctrl.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/msm/edp/edp_ctrl.c b/drivers/gpu/drm/msm/edp/edp_ctrl.c
index 81200e9..e10fa810 100644
--- a/drivers/gpu/drm/msm/edp/edp_ctrl.c
+++ b/drivers/gpu/drm/msm/edp/edp_ctrl.c
@@ -302,21 +302,24 @@ static void edp_clk_disable(struct edp_ctrl *ctrl, u32 clk_mask)
 static int edp_regulator_init(struct edp_ctrl *ctrl)
 {
 	struct device *dev = &ctrl->pdev->dev;
+	int ret;
 
 	DBG("");
 	ctrl->vdda_vreg = devm_regulator_get(dev, "vdda");
-	if (IS_ERR(ctrl->vdda_vreg)) {
+	ret = PTR_ERR_OR_ZERO(ctrl->vdda_vreg);
+	if (ret) {
 		pr_err("%s: Could not get vdda reg, ret = %ld\n", __func__,
-				PTR_ERR(ctrl->vdda_vreg));
+				ret);
 		ctrl->vdda_vreg = NULL;
-		return PTR_ERR(ctrl->vdda_vreg);
+		return ret;
 	}
 	ctrl->lvl_vreg = devm_regulator_get(dev, "lvl-vdd");
-	if (IS_ERR(ctrl->lvl_vreg)) {
-		pr_err("Could not get lvl-vdd reg, %ld",
-				PTR_ERR(ctrl->lvl_vreg));
+	ret = PTR_ERR_OR_ZERO(ctrl->lvl_vreg);
+	if (ret) {
+		pr_err("%s: Could not get lvl-vdd reg, ret = %ld\n", __func__,
+				ret);
 		ctrl->lvl_vreg = NULL;
-		return PTR_ERR(ctrl->lvl_vreg);
+		return ret;
 	}
 
 	return 0;
-- 
2.1.4

                 reply	other threads:[~2016-04-28 13:23 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1461849769-16780-1-git-send-email-vaishali.thakkar@oracle.com \
    --to=vaishali.thakkar@oracle.com \
    --cc=airlied@linux.ie \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.