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From: Wenchao Chen <wenchao.chen666@gmail.com>
To: adrian.hunter@intel.com, ulf.hansson@linaro.org
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
	zhang.lyra@gmail.com, lzx.stg@gmail.com
Subject: [PATCH Vx 5/5] mmc: sdhci: Fix host->cmd is null
Date: Wed,  7 Sep 2022 11:58:47 +0800	[thread overview]
Message-ID: <20220907035847.13783-1-wenchao.chen666@gmail.com> (raw)

From: Wenchao Chen <wenchao.chen@unisoc.com>

When data crc occurs, the kernel will panic because host->cmd is null.

Signed-off-by: Wenchao Chen <wenchao.chen@unisoc.com>
---
 drivers/mmc/host/sdhci.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 7689ffe..2511728 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3928,7 +3928,7 @@ bool sdhci_cqe_irq(struct sdhci_host *host, u32 intmask, int *cmd_error,
 
 	if (intmask & (SDHCI_INT_INDEX | SDHCI_INT_END_BIT | SDHCI_INT_CRC)) {
 		*cmd_error = -EILSEQ;
-		if (!mmc_op_tuning(host->cmd->opcode))
+		if (!mmc_op_tuning(SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND))))
 			sdhci_err_stats_inc(host, CMD_CRC);
 	} else if (intmask & SDHCI_INT_TIMEOUT) {
 		*cmd_error = -ETIMEDOUT;
@@ -3938,7 +3938,7 @@ bool sdhci_cqe_irq(struct sdhci_host *host, u32 intmask, int *cmd_error,
 
 	if (intmask & (SDHCI_INT_DATA_END_BIT | SDHCI_INT_DATA_CRC)) {
 		*data_error = -EILSEQ;
-		if (!mmc_op_tuning(host->cmd->opcode))
+		if (!mmc_op_tuning(SDHCI_GET_CMD(sdhci_readw(host, SDHCI_COMMAND))))
 			sdhci_err_stats_inc(host, DAT_CRC);
 	} else if (intmask & SDHCI_INT_DATA_TIMEOUT) {
 		*data_error = -ETIMEDOUT;
-- 
2.7.4


             reply	other threads:[~2022-09-07  4:00 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-07  3:58 Wenchao Chen [this message]
2022-09-07  7:01 ` [PATCH Vx 5/5] mmc: sdhci: Fix host->cmd is null Adrian Hunter
2022-09-14 14:00 ` Ulf Hansson

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