On Tue, Jun 4, 2024 at 7:14 AM Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote:
>
> On Tue, 4 Jun 2024 at 00:09, Kamal Dasu <kamal.dasu@xxxxxxxxxxxx> wrote:
> >
> > 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").
>
> I can't find the above commit hash. You probably want "0d84c3e6a5b2"?
>
> > 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 <kamal.dasu@xxxxxxxxxxxx>
>
> We probably want a fixes/stable tag for this too, right?
>
> Fixes: 0d84c3e6a5b2 ("mmc: core: Convert to mmc_poll_for_busy() for
> erase/trim/discard")
>
> I have amended the commit message and applied this for fixes, thanks!
>
Thank you Ulffe.
> Kind regards
> Uffe
>
>
> > ---
> > 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, "clock-frequency",
> > &priv->base_freq_hz) != 0)
> > --
> > 2.17.1
> >
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