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authorThomas Bogendoerfer <tbogendoerfer@suse.de>2020-01-22 14:13:34 +0100
committerPaul Burton <paulburton@kernel.org>2020-01-22 10:15:45 -0800
commitc0e79fd89749b0cda1c72049e2772dd2eeada86f (patch)
treeb5371da10eb10949ca253e692574a2dcc9828ab3 /arch/mips
parent4f29ad200f7b40fbcf73cd65f95087535ba78380 (diff)
downloadlinux-c0e79fd89749b0cda1c72049e2772dd2eeada86f.tar.bz2
MIPS: SGI-IP30: Check for valid pointer before using it
Fix issue detected by Smatch: ./arch/mips/sgi-ip30/ip30-irq.c:236 heart_domain_free() warn: variable dereferenced before check 'irqd' (see line 235) Fixes: 7505576d1c1a ("MIPS: add support for SGI Octane (IP30)") Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: Paul Burton <paulburton@kernel.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: <stable@vger.kernel.org> # v5.5+
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/sgi-ip30/ip30-irq.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/mips/sgi-ip30/ip30-irq.c b/arch/mips/sgi-ip30/ip30-irq.c
index d46655b914f1..c2ffcb920250 100644
--- a/arch/mips/sgi-ip30/ip30-irq.c
+++ b/arch/mips/sgi-ip30/ip30-irq.c
@@ -232,9 +232,10 @@ static void heart_domain_free(struct irq_domain *domain,
return;
irqd = irq_domain_get_irq_data(domain, virq);
- clear_bit(irqd->hwirq, heart_irq_map);
- if (irqd && irqd->chip_data)
+ if (irqd) {
+ clear_bit(irqd->hwirq, heart_irq_map);
kfree(irqd->chip_data);
+ }
}
static const struct irq_domain_ops heart_domain_ops = {