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genirq/msi: Prevent overwriting domain name

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Prevent overwriting an already assigned domain name. Remove the extra check
for chip->name, because if domain->name is NULL overwriting it with NULL is
not a problem.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20170619235443.510684976@linutronix.de
This commit is contained in:
Thomas Gleixner 2017-06-20 01:37:04 +02:00
parent 1bb3a5a763
commit 0165308a2f
1 changed files with 2 additions and 1 deletions
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3
kernel/irq/msi.c
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@ -274,7 +274,8 @@ struct irq_domain *msi_create_irq_domain(struct fwnode_handle *fwnode,
domain = irq_domain_create_hierarchy(parent, IRQ_DOMAIN_FLAG_MSI, 0,
fwnode, &msi_domain_ops, info);
if (domain && info->chip && info->chip->name)
if (domain && !domain->name && info->chip)
domain->name = info->chip->name;
return domain;