[0/1] mmc: sdhci: check host->cmd is null or not in sdhci_cqe_irq()

Message ID	20220831124359.2005165-1-paulliu@debian.org
Headers	show Return-Path: <linux-mmc-owner@kernel.org> From: "Ying-Chun Liu (PaulLiu)" <paul.liu@linaro.org> To: linux-mmc@vger.kernel.org Cc: "Ying-Chun Liu (PaulLiu)" <paul.liu@linaro.org> Subject: [PATCH 0/1] mmc: sdhci: check host->cmd is null or not in sdhci_cqe_irq() Date: Wed, 31 Aug 2022 20:43:58 +0800 Message-Id: <20220831124359.2005165-1-paulliu@debian.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	mmc: sdhci: check host->cmd is null or not in sdhci_cqe_irq() \| expand [0/1] mmc: sdhci: check host->cmd is null or not in sdhci_cqe_irq() [1/1] mmc: sdhci: check host->cmd is null or not in sdhci_cqe_irq()

Message ID

20220831124359.2005165-1-paulliu@debian.org

Headers

From: "Ying-Chun Liu (PaulLiu)" <paul.liu@linaro.org>
To: linux-mmc@vger.kernel.org
Cc: "Ying-Chun Liu (PaulLiu)" <paul.liu@linaro.org>
Subject: [PATCH 0/1] mmc: sdhci: check host->cmd is null or not in
 sdhci_cqe_irq()
Date: Wed, 31 Aug 2022 20:43:58 +0800
Message-Id: <20220831124359.2005165-1-paulliu@debian.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Series

mmc: sdhci: check host->cmd is null or not in sdhci_cqe_irq() | expand

Message

Paul Liu Aug. 31, 2022, 12:43 p.m. UTC

From: "Ying-Chun Liu (PaulLiu)" <paul.liu@linaro.org>

If we don't check host->cmd. We will get the following oops
when booting from eMMC on RockPi4.

 Unable to handle kernel read from unreadable memory at
   virtual address 0000000000000000
 Call trace:
   sdhci_cqe_irq+0x40/0x254

Ying-Chun Liu (PaulLiu) (1):
  mmc: sdhci: check host->cmd is null or not in sdhci_cqe_irq()

 drivers/mmc/host/sdhci.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)