From: Krzysztof Kozlowski <krzk@kernel.org>
To: Jassi Brar <jassisinghbrar@gmail.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
HS Liao <hs.liao@mediatek.com>,
Houlong Wei <houlong.wei@mediatek.com>,
CK Hu <ck.hu@mediatek.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Subject: [PATCH v2] maiblox: mediatek: Fix handling of platform_get_irq() error
Date: Thu, 27 Aug 2020 09:31:28 +0200 [thread overview]
Message-ID: <20200827073128.28389-1-krzk@kernel.org> (raw)
platform_get_irq() returns -ERRNO on error. In such case casting to u32
and comparing to 0 would pass the check.
Fixes: 623a6143a845 ("mailbox: mediatek: Add Mediatek CMDQ driver")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
Changes since v1:
1. Correct u32->int,
2. Fix left-over '!'.
---
drivers/mailbox/mtk-cmdq-mailbox.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index 484d4438cd83..5665b6ea8119 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -69,7 +69,7 @@ struct cmdq_task {
struct cmdq {
struct mbox_controller mbox;
void __iomem *base;
- u32 irq;
+ int irq;
u32 thread_nr;
u32 irq_mask;
struct cmdq_thread *thread;
@@ -525,10 +525,8 @@ static int cmdq_probe(struct platform_device *pdev)
}
cmdq->irq = platform_get_irq(pdev, 0);
- if (!cmdq->irq) {
- dev_err(dev, "failed to get irq\n");
- return -EINVAL;
- }
+ if (cmdq->irq < 0)
+ return cmdq->irq;
plat_data = (struct gce_plat *)of_device_get_match_data(dev);
if (!plat_data) {
--
2.17.1
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next reply other threads:[~2020-08-27 7:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-27 7:31 Krzysztof Kozlowski [this message]
2020-08-27 13:57 ` Aw: [PATCH v2] maiblox: mediatek: Fix handling of platform_get_irq() error Frank Wunderlich
2020-08-27 18:23 ` Krzysztof Kozlowski
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