diff options
| author | Krzysztof Kozlowski <krzk@kernel.org> | 2020-08-27 10:31:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-29 11:57:52 +0300 |
| commit | 180cf2e5f722e7125516f51803086394334cda4b (patch) | |
| tree | cd6883ee12f8ad145db34859ebe5293580082baf | |
| parent | e7f0b9ab8b7d49dd28aece9ee598f1faada34380 (diff) | |
| download | linux-180cf2e5f722e7125516f51803086394334cda4b.tar.xz | |
maiblox: mediatek: Fix handling of platform_get_irq() error
[ Upstream commit 558e4c36ec9f2722af4fe8ef84dc812bcdb5c43a ]
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>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/mailbox/mtk-cmdq-mailbox.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index 9a6ce9f5a7db..3c8b365ce635 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -70,7 +70,7 @@ 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; @@ -474,10 +474,8 @@ 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; cmdq->thread_nr = (u32)(unsigned long)of_device_get_match_data(dev); cmdq->irq_mask = GENMASK(cmdq->thread_nr - 1, 0); |