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Date:   Wed, 17 Jun 2020 18:15:57 -0500
From:   "Gustavo A. R. Silva" <>
To:     Karsten Keil <>,
        "David S. Miller" <>
        "Gustavo A. R. Silva" <>
Subject: [PATCH][next] mISDN: hfcsusb: Use struct_size() helper

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.

This code was detected with the help of Coccinelle and, audited and
fixed manually.

Signed-off-by: Gustavo A. R. Silva <>
 drivers/isdn/hardware/mISDN/hfcsusb.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/isdn/hardware/mISDN/hfcsusb.c b/drivers/isdn/hardware/mISDN/hfcsusb.c
index 621364bb6b12..4274906f8654 100644
--- a/drivers/isdn/hardware/mISDN/hfcsusb.c
+++ b/drivers/isdn/hardware/mISDN/hfcsusb.c
@@ -261,8 +261,7 @@ hfcsusb_ph_info(struct hfcsusb *hw)
 		phi->bch[i].Flags = hw->bch[i].Flags;
 	_queue_data(&dch->dev.D, MPH_INFORMATION_IND, MISDN_ID_ANY,
-		    sizeof(struct ph_info_dch) + dch->dev.nrbchan *
-		    sizeof(struct ph_info_ch), phi, GFP_ATOMIC);
+		    struct_size(phi, bch, dch->dev.nrbchan), phi, GFP_ATOMIC);

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