FAILED: patch "[PATCH] mmc: sdhci: Update the tuning failed messages to pr_debug" failed to apply to 4.9-stable tree

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 2c92dd20304f505b6ef43d206fff21bda8f1f0ae Mon Sep 17 00:00:00 2001
From: Faiz Abbas <[email protected]>
Date: Fri, 6 Dec 2019 17:13:26 +0530
Subject: [PATCH] mmc: sdhci: Update the tuning failed messages to pr_debug
level

Tuning support in DDR50 speed mode was added in SD Specifications Part1 Physical Layer Specification v3.01. Its not possible to distinguish between v3.00 and v3.01 from the SCR and that is why since commit 4324f6de6d2e ("mmc: core: enable CMD19 tuning for DDR50 mode") tuning failures are ignored in DDR50 speed mode.

Cards compatible with v3.00 don't respond to CMD19 in DDR50 and this error gets printed during enumeration and also if retune is triggered at any time during operation. Update the printk level to pr_debug so that these errors don't lead to false error reports.

index 296d955ede59..42a9c8179da7 100644
@@ -2417,8 +2417,8 @@ static int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
 		sdhci_send_tuning(host, opcode);
 
 		if (!host->tuning_done) {
-			pr_info("%s: Tuning timeout, falling back to fixed sampling clock\n",
-				mmc_hostname(host->mmc));
+			pr_debug("%s: Tuning timeout, falling back to fixed sampling clock\n",
+				 mmc_hostname(host->mmc));
 			sdhci_abort_tuning(host, opcode);
 			return -ETIMEDOUT;
 		}

After 4.9 sdhci_execute_tuning() got split up into multiple functions, and the actual text in the message was changed. I've adjusted the patch and queued it up for 4.9 and 4.4.

Thanks,
Sasha