generic: 5.15: backport smempart parser fixup patch with EPROBE_DEFER error

Backport patch from kernel 5.15 that mute error on EPROBE_DEFER with
smempart parser.

This parser require the smem device to be probed first and currently it
may happen that mtd gets probed before the smem device causing an error
on the smempart parser. This error may be confusing and should be muted.

Signed-off-by: Christian Marangi <[email protected]>

target/linux/generic/backport-5.15/407-v5.17-mtd-parsers-qcom-Don-t-print-error-message-on-EPROBE.patch

@@ -0,0 +1,32 @@
+From 26bccc9671ba5e01f7153addbe94e7dc3f677375 Mon Sep 17 00:00:00 2001
+From: Bryan O'Donoghue <[email protected]>
+Date: Mon, 3 Jan 2022 03:03:16 +0000
+Subject: [PATCH 13/14] mtd: parsers: qcom: Don't print error message on
+ -EPROBE_DEFER
+
+Its possible for the main smem driver to not be loaded by the time we come
+along to parse the smem partition description but, this is a perfectly
+normal thing.
+
+No need to print out an error message in this case.
+
+Signed-off-by: Bryan O'Donoghue <[email protected]>
+Reviewed-by: Manivannan Sadhasivam <[email protected]>
+Signed-off-by: Miquel Raynal <[email protected]>
+Link: https://lore.kernel.org/linux-mtd/[email protected]
+---
+ drivers/mtd/parsers/qcomsmempart.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/drivers/mtd/parsers/qcomsmempart.c
++++ b/drivers/mtd/parsers/qcomsmempart.c
+@@ -75,7 +75,8 @@ static int parse_qcomsmem_part(struct mt
+ 	pr_debug("Parsing partition table info from SMEM\n");
+ 	ptable = qcom_smem_get(SMEM_APPS, SMEM_AARM_PARTITION_TABLE, &len);
+ 	if (IS_ERR(ptable)) {
+-		pr_err("Error reading partition table header\n");
++		if (PTR_ERR(ptable) != -EPROBE_DEFER)
++			pr_err("Error reading partition table header\n");
+ 		return PTR_ERR(ptable);
+ 	}
+