linux-kernel - [PATCH v3 3/9] mtd: spi-nor: core: Use auto-detection only once

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Message-ID: <20220411091033.98754-4-tudor.ambarus@microchip.com>
Date:   Mon, 11 Apr 2022 12:10:27 +0300
From:   Tudor Ambarus <tudor.ambarus@...rochip.com>
To:     <p.yadav@...com>, <michael@...le.cc>
CC:     <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <nicolas.ferre@...rochip.com>,
        Tudor Ambarus <tudor.ambarus@...rochip.com>
Subject: [PATCH v3 3/9] mtd: spi-nor: core: Use auto-detection only once

In case spi_nor_match_name() returned NULL, the auto detection was
issued twice. There's no reason to try to detect the same chip twice,
do the auto detection only once.

Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
---
v3:                                                                             
- caller of spi_nor_get_flash_info now handles NULL and translates it to        
ENOENT.

 drivers/mtd/spi-nor/core.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index b9cc8bbf1f62..b55d922d46dd 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -2896,13 +2896,14 @@ static const struct flash_info *spi_nor_get_flash_info(struct spi_nor *nor,
 {
 	const struct flash_info *info = NULL;
 
-	if (name)
+	if (name) {
 		info = spi_nor_match_name(nor, name);
+		if (IS_ERR(info))
+			return info;
+	}
 	/* Try to auto-detect if chip name wasn't specified or not found */
 	if (!info)
-		info = spi_nor_read_id(nor);
-	if (IS_ERR_OR_NULL(info))
-		return ERR_PTR(-ENOENT);
+		return spi_nor_read_id(nor);
 
 	/*
 	 * If caller has specified name of flash model that can normally be
@@ -2994,7 +2995,9 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
 		return -ENOMEM;
 
 	info = spi_nor_get_flash_info(nor, name);
-	if (IS_ERR(info))
+	if (!info)
+		return -ENOENT;
+	else if (IS_ERR(info))
 		return PTR_ERR(info);
 
 	nor->info = info;
-- 
2.25.1