diff mbox series

mmc: core: log empty non-removable slots

Message ID d2444591-c91b-a94d-71e2-9dedc3b6c514@free.fr
State New
Headers show
Series mmc: core: log empty non-removable slots | expand

Commit Message

Marc Gonzalez March 21, 2023, 6:01 p.m. UTC
An empty non-removable slot might be the symptom of probing too early.

Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
---
 drivers/mmc/core/core.c | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Marc Gonzalez March 23, 2023, 3:33 p.m. UTC | #1
On 23/03/2023 13:13, Ulf Hansson wrote:

> On Tue, 21 Mar 2023 at 19:01, Marc Gonzalez wrote:
>
>> An empty non-removable slot might be the symptom of probing too early.
> 
> I took the liberty of adjusting the code and the commit message a bit.
> Please let me know if it doesn't look good to you.
> 
> So, applied for next, thanks!

Thanks for reviewing & merging.

Can you tell me (for my knowledge) why it's better to check
host->bus_ops than host->card ?

If the situation should not happen, perhaps we should use pr_warn?

Regards
Ulf Hansson March 24, 2023, 3:56 p.m. UTC | #2
On Thu, 23 Mar 2023 at 16:33, Marc Gonzalez <marc.w.gonzalez@free.fr> wrote:
>
> On 23/03/2023 13:13, Ulf Hansson wrote:
>
> > On Tue, 21 Mar 2023 at 19:01, Marc Gonzalez wrote:
> >
> >> An empty non-removable slot might be the symptom of probing too early.
> >
> > I took the liberty of adjusting the code and the commit message a bit.
> > Please let me know if it doesn't look good to you.
> >
> > So, applied for next, thanks!
>
> Thanks for reviewing & merging.
>
> Can you tell me (for my knowledge) why it's better to check
> host->bus_ops than host->card ?

It doesn't really matter at this point, but to keep consistency for
some other earlier code in mmc_rescan(), I decided to use
host->bus_ops instead.

>
> If the situation should not happen, perhaps we should use pr_warn?

Yes, maybe you are right.

In principle, I didn't want to use the warning level as I simply
didn't know if we would end up spamming the log with lots of prints
for various platforms. Perhaps we should change, when we know a bit
more?

Kind regards
Uffe
diff mbox series

Patch

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 426c7f66b3492..b8137baecee7c 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -2257,6 +2257,10 @@  void mmc_rescan(struct work_struct *work)
 			break;
 	}
 
+	if (!mmc_card_is_removable(host) && !host->card)
+		pr_info("%s: no card detected, check post-power-on-delay-ms",
+			mmc_hostname(host));
+
 	/*
 	 * Ignore the command timeout errors observed during
 	 * the card init as those are excepted.