netdev - [PATCH net-next 1/1] net: ipa: use struct_size() for the interconnect array

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Date:   Fri, 11 Mar 2022 10:24:23 -0600
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     bjorn.andersson@...aro.org, mka@...omium.org, evgreen@...omium.org,
        cpratapa@...eaurora.org, avuyyuru@...eaurora.org,
        jponduru@...eaurora.org, subashab@...eaurora.org, elder@...nel.org,
        netdev@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net-next 1/1] net: ipa: use struct_size() for the interconnect array

In review for commit 8ee7ec4890e2b ("net: ipa: embed interconnect
array in the power structure"), Jakub Kicinski suggested that a
follow-up patch use struct_size() when computing the size of the
IPA power structure, which ends with a flexible array member.

Do that.

Suggested-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_power.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ipa/ipa_power.c b/drivers/net/ipa/ipa_power.c
index 16ece27d14d7e..db5ac7552286e 100644
--- a/drivers/net/ipa/ipa_power.c
+++ b/drivers/net/ipa/ipa_power.c
@@ -374,8 +374,8 @@ ipa_power_init(struct device *dev, const struct ipa_power_data *data)
 		goto err_clk_put;
 	}
 
-	size = data->interconnect_count * sizeof(power->interconnect[0]);
-	power = kzalloc(sizeof(*power) + size, GFP_KERNEL);
+	size = struct_size(power, interconnect, data->interconnect_count);
+	power = kzalloc(size, GFP_KERNEL);
 	if (!power) {
 		ret = -ENOMEM;
 		goto err_clk_put;
-- 
2.32.0