linux-kernel - [PATCH V1 1/2] mmc: core: Introduce new flag to force hardware reset

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Message-Id: <20220603051534.22672-2-quic_sartgarg@quicinc.com>
Date:   Fri,  3 Jun 2022 10:45:32 +0530
From:   Sarthak Garg <quic_sartgarg@...cinc.com>
To:     adrian.hunter@...el.com, ulf.hansson@...aro.org
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, quic_kamasali@...cinc.com,
        quic_rampraka@...cinc.com, quic_pragalla@...cinc.com,
        quic_sayalil@...cinc.com, Sarthak Garg <quic_sartgarg@...cinc.com>,
        Jens Axboe <axboe@...nel.dk>,
        Avri Altman <Avri.Altman@....com>,
        Chaitanya Kulkarni <kch@...dia.com>,
        Christian Löhle <CLoehle@...erstone.com>,
        Bean Huo <beanhuo@...ron.com>,
        Vincent Whitchurch <vincent.whitchurch@...s.com>,
        Dmitry Osipenko <digetx@...il.com>,
        Stephen Boyd <swboyd@...omium.org>
Subject: [PATCH V1 1/2] mmc: core: Introduce new flag to force hardware reset

Introduce new flag cqe_recovery_reset_always to allow vendors to force
hardware reset during cqe recovery.

Signed-off-by: Sarthak Garg <quic_sartgarg@...cinc.com>
---
 drivers/mmc/core/block.c | 2 +-
 include/linux/mmc/host.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 1259ca22d625..496cdd8a2999 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -1497,7 +1497,7 @@ void mmc_blk_cqe_recovery(struct mmc_queue *mq)
 	pr_debug("%s: CQE recovery start\n", mmc_hostname(host));
 
 	err = mmc_cqe_recovery(host);
-	if (err)
+	if (err || host->cqe_recovery_reset_always)
 		mmc_blk_reset(mq->blkdata, host, MMC_BLK_CQE_RECOVERY);
 	else
 		mmc_blk_reset_success(mq->blkdata, MMC_BLK_CQE_RECOVERY);
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index c193c50ccd78..3e2fe950b4ec 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -492,6 +492,7 @@ struct mmc_host {
 	int			cqe_qdepth;
 	bool			cqe_enabled;
 	bool			cqe_on;
+	bool			cqe_recovery_reset_always;
 
 	/* Inline encryption support */
 #ifdef CONFIG_MMC_CRYPTO
-- 
2.17.1