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path: root/drivers/mailbox
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-rw-r--r--drivers/mailbox/rockchip-mailbox.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mailbox/rockchip-mailbox.c b/drivers/mailbox/rockchip-mailbox.c
index b79a2871227c..d702a204f5c1 100644
--- a/drivers/mailbox/rockchip-mailbox.c
+++ b/drivers/mailbox/rockchip-mailbox.c
@@ -213,7 +213,7 @@ static int rockchip_mbox_probe(struct platform_device *pdev)
return PTR_ERR(mb->mbox_base);
/* Each channel has two buffers for A2B and B2A */
- mb->buf_size = resource_size(res) / (drv_data->num_chans * 2);
+ mb->buf_size = (size_t)resource_size(res) / (drv_data->num_chans * 2);
mb->pclk = devm_clk_get(&pdev->dev, "pclk_mailbox");
if (IS_ERR(mb->pclk)) {