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Mon, 03 Jun 2024 15:09:38 -0700 (PDT) Received: from mail.broadcom.net ([192.19.144.250]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6aff97cc497sm546986d6.60.2024.06.03.15.09.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Jun 2024 15:09:38 -0700 (PDT) From: Kamal Dasu To: ulf.hansson@linaro.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, ludovic.barre@st.com Cc: f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, Kamal Dasu Subject: [PATCH v2 1/1] mmc: sdhci-brcmstb: check R1_STATUS for erase/trim/discard Date: Mon, 3 Jun 2024 18:08:34 -0400 Message-Id: <20240603220834.21989-2-kamal.dasu@broadcom.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240603220834.21989-1-kamal.dasu@broadcom.com> References: <20240603220834.21989-1-kamal.dasu@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000e79db1061a0396c5" Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: --000000000000e79db1061a0396c5 When erase/trim/discard completion was converted to mmc_poll_for_busy(), optional ->card_busy() host ops support was added as part of dd0d84c3e6a5b2 ("mmc: core: Convert to mmc_poll_for_busy() for erase/trim/discard"). sdhci card->busy() could return busy for long periods to cause mmc_do_erase() to block during discard operation as shown below during mkfs.f2fs : Info: [/dev/mmcblk1p9] Discarding device [ 39.597258] sysrq: Show Blocked State [ 39.601183] task:mkfs.f2fs state:D stack:0 pid:1561 tgid:1561 ppid:1542 flags:0x0000000d [ 39.610609] Call trace: [ 39.613098] __switch_to+0xd8/0xf4 [ 39.616582] __schedule+0x440/0x4f4 [ 39.620137] schedule+0x2c/0x48 [ 39.623341] schedule_hrtimeout_range_clock+0xe0/0x114 [ 39.628562] schedule_hrtimeout_range+0x10/0x18 [ 39.633169] usleep_range_state+0x5c/0x90 [ 39.637253] __mmc_poll_for_busy+0xec/0x128 [ 39.641514] mmc_poll_for_busy+0x48/0x70 [ 39.645511] mmc_do_erase+0x1ec/0x210 [ 39.649237] mmc_erase+0x1b4/0x1d4 [ 39.652701] mmc_blk_mq_issue_rq+0x35c/0x6ac [ 39.657037] mmc_mq_queue_rq+0x18c/0x214 [ 39.661022] blk_mq_dispatch_rq_list+0x3a8/0x528 [ 39.665722] __blk_mq_sched_dispatch_requests+0x3a0/0x4ac [ 39.671198] blk_mq_sched_dispatch_requests+0x28/0x5c [ 39.676322] blk_mq_run_hw_queue+0x11c/0x12c [ 39.680668] blk_mq_flush_plug_list+0x200/0x33c [ 39.685278] blk_add_rq_to_plug+0x68/0xd8 [ 39.689365] blk_mq_submit_bio+0x3a4/0x458 [ 39.693539] __submit_bio+0x1c/0x80 [ 39.697096] submit_bio_noacct_nocheck+0x94/0x174 [ 39.701875] submit_bio_noacct+0x1b0/0x22c [ 39.706042] submit_bio+0xac/0xe8 [ 39.709424] blk_next_bio+0x4c/0x5c [ 39.712973] blkdev_issue_secure_erase+0x118/0x170 [ 39.717835] blkdev_common_ioctl+0x374/0x728 [ 39.722175] blkdev_ioctl+0x8c/0x2b0 [ 39.725816] vfs_ioctl+0x24/0x40 [ 39.729117] __arm64_sys_ioctl+0x5c/0x8c [ 39.733114] invoke_syscall+0x68/0xec [ 39.736839] el0_svc_common.constprop.0+0x70/0xd8 [ 39.741609] do_el0_svc+0x18/0x20 [ 39.744981] el0_svc+0x68/0x94 [ 39.748107] el0t_64_sync_handler+0x88/0x124 [ 39.752455] el0t_64_sync+0x168/0x16c This problem is obsereved with BLKSECDISCARD ioctl on brcmstb mmc controllers. Fix makes mmc_host_ops.card_busy NULL and forces MMC_SEND_STATUS and R1_STATUS check in mmc_busy_cb() function. Signed-off-by: Kamal Dasu --- drivers/mmc/host/sdhci-brcmstb.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/mmc/host/sdhci-brcmstb.c b/drivers/mmc/host/sdhci-brcmstb.c index 9053526fa212..150fb477b7cc 100644 --- a/drivers/mmc/host/sdhci-brcmstb.c +++ b/drivers/mmc/host/sdhci-brcmstb.c @@ -24,6 +24,7 @@ #define BRCMSTB_MATCH_FLAGS_NO_64BIT BIT(0) #define BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT BIT(1) #define BRCMSTB_MATCH_FLAGS_HAS_CLOCK_GATE BIT(2) +#define BRCMSTB_MATCH_FLAGS_USE_CARD_BUSY BIT(4) #define BRCMSTB_PRIV_FLAGS_HAS_CQE BIT(0) #define BRCMSTB_PRIV_FLAGS_GATE_CLOCK BIT(1) @@ -384,6 +385,9 @@ static int sdhci_brcmstb_probe(struct platform_device *pdev) if (match_priv->flags & BRCMSTB_MATCH_FLAGS_BROKEN_TIMEOUT) host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL; + if (!(match_priv->flags & BRCMSTB_MATCH_FLAGS_USE_CARD_BUSY)) + host->mmc_host_ops.card_busy = NULL; + /* Change the base clock frequency if the DT property exists */ if (device_property_read_u32(&pdev->dev, 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