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x86/hpet: Check for irq==0 when allocating hpet MSI interrupts

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irq == 0 is not a valid irq for a irqdomain MSI allocation, but hpet
code checks only for negative return values.

Reported-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Link: http://lkml.kernel.org/r/558447AF.30703@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jiang Liu 2015-06-20 11:50:50 +02:00 committed by Thomas Gleixner
parent f6b1464f64
commit bafac298fb
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/hpet.c
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@ -578,7 +578,7 @@ static void hpet_msi_capability_lookup(unsigned int start_timer)
continue;
irq = hpet_assign_irq(hpet_domain, hdev, hdev->num);
if (irq < 0)
if (irq <= 0)
continue;
sprintf(hdev->name, "hpet%d", i);