linux-kernel - Re: [PATCH V2] MMC: core: cap MMC card timeouts at 2 seconds.

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Message-ID: <87pq9jhyvl.fsf@laptop.org>
Date:	Fri, 01 Jun 2012 10:48:14 -0400
From:	Chris Ball <cjb@...top.org>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	"Torne \(Richard Coles\)" <torne@...gle.com>,
	Ben Hutchings <ben@...adent.org.uk>, linus.walleij@...aro.org,
	jh80.chung@...sung.com, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2] MMC: core: cap MMC card timeouts at 2 seconds.

Hi,

On Fri, Jun 01 2012, Adrian Hunter wrote:
> I just noticed that from linux 3.4, the SD write timeout is now 3 seconds
> triggering the sdhci driver warning on every write on every SD card.
> So change pr_warning to DGB in sdhci_calc_timeout().  Chris?

Oops, thanks for noticing:


Subject: mmc: sdhci: Use DBG() instead of pr_warning() on large timeout

3bdc9ba892d6 ("mmc: use really long write timeout to deal with crappy
cards") in 3.4 increased the write timeout that the core sends to host
drivers to 3 seconds.  This makes sdhci's "requested timeout too large"
warning trigger on every write; so, change this pr_warning() to a DBG().

Reported-by: Adrian Hunter <adrian.hunter@...el.com>
Signed-off-by: Chris Ball <cjb@...top.org>
---
 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 e626732..f4b8b4d 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -680,8 +680,8 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd)
 	}
 
 	if (count >= 0xF) {
-		pr_warning("%s: Too large timeout 0x%x requested for CMD%d!\n",
-			   mmc_hostname(host->mmc), count, cmd->opcode);
+		DBG("%s: Too large timeout 0x%x requested for CMD%d!\n",
+		    mmc_hostname(host->mmc), count, cmd->opcode);
 		count = 0xE;
 	}
 
-- 
Chris Ball   <cjb@...top.org>   <http://printf.net/>
One Laptop Per Child
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