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x86/PCI: Use struct_size() in pirq_convert_irt_table()

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Use struct_size() instead of hand-writing it. It is less verbose, more
robust and more informative.

Link: https://lore.kernel.org/r/00a5cc2cd322e7dea26579916ac6dda9c637aa57.1684518118.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Christophe JAILLET 2023-05-19 19:42:28 +02:00 committed by Bjorn Helgaas
parent 091f9f7f3b
commit c00f94ad9a
1 changed files with 2 additions and 2 deletions
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4
arch/x86/pci/irq.c
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@ -136,14 +136,14 @@ static inline struct irq_routing_table *pirq_convert_irt_table(u8 *addr,
if (ir->signature != IRT_SIGNATURE || !ir->used || ir->size < ir->used)
return NULL;
size = sizeof(*ir) + ir->used * sizeof(ir->slots[0]);
size = struct_size(ir, slots, ir->used);
if (size > limit - addr)
return NULL;
DBG(KERN_DEBUG "PCI: $IRT Interrupt Routing Table found at 0x%lx\n",
__pa(ir));
size = sizeof(*rt) + ir->used * sizeof(rt->slots[0]);
size = struct_size(rt, slots, ir->used);
rt = kzalloc(size, GFP_KERNEL);
if (!rt)
return NULL;