linux-kernel - [PATCH] staging: mt7621-dma: sizeof via pointer dereference

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Message-ID: <20190530235348.j3orly64wadtjydx@valkyrie-prime.rpi>
Date:   Thu, 30 May 2019 23:53:48 +0000
From:   Benjamin Sherman <benjamin@...sherman.io>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Matthias Brugger <matthias.bgg@...il.com>,
        devel@...verdev.osuosl.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: mt7621-dma: sizeof via pointer dereference

Pass the size of a struct into kzalloc by pointer dereference.  This
complies with the Linux kernel coding style and removes the possibility
for a bug if the pointer's type is changed.

Signed-off-by: Benjamin Sherman <benjamin@...sherman.io>
---
 drivers/staging/mt7621-dma/mtk-hsdma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/mt7621-dma/mtk-hsdma.c b/drivers/staging/mt7621-dma/mtk-hsdma.c
index a58725dd2611..60db06768c8a 100644
--- a/drivers/staging/mt7621-dma/mtk-hsdma.c
+++ b/drivers/staging/mt7621-dma/mtk-hsdma.c
@@ -468,7 +468,7 @@ static struct dma_async_tx_descriptor *mtk_hsdma_prep_dma_memcpy(
 	if (len <= 0)
 		return NULL;
 
-	desc = kzalloc(sizeof(struct mtk_hsdma_desc), GFP_ATOMIC);
+	desc = kzalloc(sizeof(*desc), GFP_ATOMIC);
 	if (!desc) {
 		dev_err(c->device->dev, "alloc memcpy decs error\n");
 		return NULL;
-- 
2.21.0