From f16a3bb69aa6baabf8f0aca982c8cf21e2a4f6bc Mon Sep 17 00:00:00 2001
From: Sergey Shtylyov <s.shtylyov@omp.ru>
Date: Sun, 30 May 2021 22:13:45 +0300
Subject: [PATCH] i2c: highlander: add IRQ check
Git-commit: f16a3bb69aa6baabf8f0aca982c8cf21e2a4f6bc
Patch-mainline: v5.15-rc1
References: git-fixes
The driver is written as if platform_get_irq() returns 0 on errors (while
actually it returns a negative error code), blithely passing these error
codes to request_irq() (which takes *unsigned* IRQ #) -- which fails with
-EINVAL. Add the necessary error check to the pre-existing *if* statement
forcing the driver into the polling mode...
Fixes: 4ad48e6ab18c ("i2c: Renesas Highlander FPGA SMBus support")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/i2c/busses/i2c-highlander.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-highlander.c b/drivers/i2c/busses/i2c-highlander.c
index 803dad70e2a7..a2add128d084 100644
--- a/drivers/i2c/busses/i2c-highlander.c
+++ b/drivers/i2c/busses/i2c-highlander.c
@@ -379,7 +379,7 @@ static int highlander_i2c_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, dev);
dev->irq = platform_get_irq(pdev, 0);
- if (iic_force_poll)
+ if (dev->irq < 0 || iic_force_poll)
dev->irq = 0;
if (dev->irq) {
--
2.26.2