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powerpc/xive: Add a check for memory allocation failure 

The result of this kzalloc is not checked. Add a check and corresponding
error handling code.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/cc53462734dfeaf15b6bad0e626b483de18656b4.1564647619.git.christophe.jaillet@wanadoo.fr
This commit is contained in:
Christophe JAILLET 2019-08-01 10:32:42 +02:00 committed by Michael Ellerman
parent b214a8f2ea
commit fd3806562f
1 changed files with 4 additions and 0 deletions
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arch/powerpc/sysdev/xive/spapr.c
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@ -53,6 +53,10 @@ static int xive_irq_bitmap_add(int base, int count)
xibm->base = base; xibm->base = base;
xibm->count = count; xibm->count = count;
xibm->bitmap = kzalloc(xibm->count, GFP_KERNEL); xibm->bitmap = kzalloc(xibm->count, GFP_KERNEL);
if (!xibm->bitmap) {
kfree(xibm);
return -ENOMEM;
}
list_add(&xibm->list, &xive_irq_bitmaps); list_add(&xibm->list, &xive_irq_bitmaps);
pr_info("Using IRQ range [%x-%x]", xibm->base, pr_info("Using IRQ range [%x-%x]", xibm->base,