diff options
| author | Sergio Paracuellos <sergio.paracuellos@gmail.com> | 2026-06-26 08:01:11 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> | 2026-06-30 16:36:35 +0200 |
| commit | 0e024f58291dfcb28d98c512002e1a80fad69798 (patch) | |
| tree | 8d326de297a0a75ee63d06a19b9f97e780789aae | |
| parent | 839738536adabae1a7e98ed3fc332ce9cc991d27 (diff) | |
gpio: mt7621: be sure IRQ domain is created before exposing GPIO chips
Function 'mediatek_gpio_bank_probe()' registers three GPIO chips using
'devm_gpiochip_add_data()'. At this point, the chips become live and visible
to consumers. However, the IRQ domain isn't allocated and set up until
'mt7621_gpio_irq_setup()' is called after the GPIO chips setup finishes.
If a consumer requests a GPIO IRQ concurrently 'mt7621_gpio_to_irq()' can
be called and pass a NULL irq domain pointer irq_create_mapping(), that can
corrupt the mappings or cause a crash. Fix this possible problem seting up
irq domain before GPIO chips setup is performed.
Cc: stable@vger.kernel.org
Reported-by: Sashiko <sashiko-bot@kernel.org>
Fixes: a46f2e5720f5 ("gpio: mt7621: fix interrupt banks mapping on gpio chips")
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://patch.msgid.link/20260626060112.2498324-4-sergio.paracuellos@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
| -rw-r--r-- | drivers/gpio/gpio-mt7621.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpio/gpio-mt7621.c b/drivers/gpio/gpio-mt7621.c index 57384ef74703..1b0b5247d3c9 100644 --- a/drivers/gpio/gpio-mt7621.c +++ b/drivers/gpio/gpio-mt7621.c @@ -466,12 +466,6 @@ mediatek_gpio_probe(struct platform_device *pdev) mtk->num_gpios = MTK_BANK_WIDTH * MTK_BANK_CNT; platform_set_drvdata(pdev, mtk); - for (i = 0; i < MTK_BANK_CNT; i++) { - ret = mediatek_gpio_bank_probe(dev, i); - if (ret) - return ret; - } - if (mtk->gpio_irq > 0) { ret = mt7621_gpio_irq_setup(pdev, mtk); if (ret) @@ -482,6 +476,12 @@ mediatek_gpio_probe(struct platform_device *pdev) if (ret) return ret; + for (i = 0; i < MTK_BANK_CNT; i++) { + ret = mediatek_gpio_bank_probe(dev, i); + if (ret) + return ret; + } + return 0; } |