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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Matthias Brugger , AngeloGioacchino Del Regno , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, kernel-janitors@vger.kernel.org Subject: [PATCH net-next] net: ethernet: mtk_wed: Fix NULL vs IS_ERR() bug in mtk_wed_get_memory_region() Message-ID: <87c10dbd-df86-4971-b4f5-40ba02c076fb@sabinyo.mountain> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" We recently changed this from using devm_ioremap() to using devm_ioremap_resource() and unfortunately the former returns NULL while the latter returns error pointers. The check for errors needs to be updated as well. Fixes: e27dba1951ce ("net: Use of_reserved_mem_region_to_resource{_byname}(= ) for "memory-region"") Signed-off-by: Dan Carpenter Acked-by: Lorenzo Bianconi --- drivers/net/ethernet/mediatek/mtk_wed_mcu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c b/drivers/net/ethe= rnet/mediatek/mtk_wed_mcu.c index 8498b35ec7a6..fa6b21603416 100644 --- a/drivers/net/ethernet/mediatek/mtk_wed_mcu.c +++ b/drivers/net/ethernet/mediatek/mtk_wed_mcu.c @@ -247,8 +247,10 @@ mtk_wed_get_memory_region(struct mtk_wed_hw *hw, const= char *name, region->phy_addr =3D res.start; region->size =3D resource_size(&res); region->addr =3D devm_ioremap_resource(hw->dev, &res); + if (IS_ERR(region->addr)) + return PTR_ERR(region->addr); =20 - return !region->addr ? -EINVAL : 0; + return 0; } =20 static int --=20 2.47.2