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irq/generic-chip: Don't replace domain's name 

When generic irq chips are allocated for an irq domain the domain name is
set to the irq chip name. That was done to have named domains before the
recent changes which enforce domain naming were done.

Since then the overwrite causes a memory leak when the domain name is
dynamically allocated and even worse it would cause the domain free code to
free the wrong name pointer, which might point to a constant.

Remove the name assignment to prevent this.

Fixes: d59f6617ee ("genirq: Allow fwnode to carry name information only")
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20170928043731.4764-1-jeffy.chen@rock-chips.com
This commit is contained in:
Jeffy Chen 2017-09-28 12:37:31 +08:00 committed by Thomas Gleixner
parent 7755d83e48
commit 72364d3206
1 changed files with 0 additions and 1 deletions
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kernel/irq/generic-chip.c
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@ -322,7 +322,6 @@ int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
/* Calc pointer to the next generic chip */ /* Calc pointer to the next generic chip */
tmp += sizeof(*gc) + num_ct * sizeof(struct irq_chip_type); tmp += sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
} }
d->name = name;
return 0; return 0;
} }
EXPORT_SYMBOL_GPL(__irq_alloc_domain_generic_chips); EXPORT_SYMBOL_GPL(__irq_alloc_domain_generic_chips);