linux-kernel - [PATCH v3] ata: libata-core: Simplies if condition

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Message-ID: <OS3P286MB0632EC8F4BE2127EF092F59B9E789@OS3P286MB0632.JPNP286.PROD.OUTLOOK.COM>
Date:   Mon, 15 May 2023 10:36:58 +0800
From:   Yahu Gao <yahu.gao@...look.com>
To:     dlemoal@...nel.org
Cc:     linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
        Yahu Gao <gaoyh12@...ovo.com>
Subject: [PATCH v3] ata: libata-core: Simplies if condition

From: Yahu Gao <gaoyh12@...ovo.com>

Simplify the condition used in ata_dev_revalidate() to not
issue identify commands to port multiplier devices.

Signed-off-by: Yahu Gao <gaoyh12@...ovo.com>
---
 drivers/ata/libata-core.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

Changes since V1:
 1. Update the subject
 2. Add more descriptive
 3. Remove review-by without email
 4. keep "ata_class_enabled(new_class) &&" condition

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 14c17c3bda4e..2c9472b00f17 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3802,11 +3802,7 @@ int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
 		return -ENODEV;
 
 	/* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
-	if (ata_class_enabled(new_class) &&
-	    new_class != ATA_DEV_ATA &&
-	    new_class != ATA_DEV_ATAPI &&
-	    new_class != ATA_DEV_ZAC &&
-	    new_class != ATA_DEV_SEMB) {
+	if (ata_class_enabled(new_class) && new_class == ATA_DEV_PMP) {
 		ata_dev_info(dev, "class mismatch %u != %u\n",
 			     dev->class, new_class);
 		rc = -ENODEV;
-- 
2.39.1