genirq/msi: Use kmemdup_array() instead of kmemdup()

Let kmemdup_array() take care about sizing instead of doing it open coded.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240828072219.1249250-1-ruanjinjie@huawei.com

diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 5fa0547ece0c4d493f45821c9d062611232bda9a..1c7e5159064cc5a4b610291a3ccd0babd16df9a6 100644 (file)
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -82,7 +82,7 @@ static struct msi_desc *msi_alloc_desc(struct device *dev, int nvec,
        desc->dev = dev;
        desc->nvec_used = nvec;
        if (affinity) {
-               desc->affinity = kmemdup(affinity, nvec * sizeof(*desc->affinity), GFP_KERNEL);
+               desc->affinity = kmemdup_array(affinity, nvec, sizeof(*desc->affinity), GFP_KERNEL);
                if (!desc->affinity) {
                        kfree(desc);
                        return NULL;