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| author | Guenter Roeck <linux@roeck-us.net> | 2016-09-13 20:32:44 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-27 12:30:37 +0200 |
| commit | 60ca5e0d280b1a51df55c5fc2e5bfe010b344c5a (patch) | |
| tree | 3389804982b1d415687846bb67308b646cf5320b /drivers/base | |
| parent | 78618d395b65fadb2937a985308c3a4d2897ade2 (diff) | |
| download | linux-60ca5e0d280b1a51df55c5fc2e5bfe010b344c5a.tar.bz2 | |
driver-core: platform: Catch errors from calls to irq_get_irq_data
irq_get_irq_data() can return NULL, which results in a nasty crash.
Check its return value before passing it on to irqd_set_trigger_type().
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/platform.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 44c9d4daf510..c4af00385502 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -108,9 +108,14 @@ int platform_get_irq(struct platform_device *dev, unsigned int num) * IORESOURCE_BITS correspond 1-to-1 to the IRQF_TRIGGER* * settings. */ - if (r && r->flags & IORESOURCE_BITS) - irqd_set_trigger_type(irq_get_irq_data(r->start), - r->flags & IORESOURCE_BITS); + if (r && r->flags & IORESOURCE_BITS) { + struct irq_data *irqd; + + irqd = irq_get_irq_data(r->start); + if (!irqd) + return -ENXIO; + irqd_set_trigger_type(irqd, r->flags & IORESOURCE_BITS); + } return r ? r->start : -ENXIO; #endif |