linux-kernel - [PATCH] ata: pata_artop: remove redundant initialization of pio

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Date:   Thu, 14 Sep 2017 19:54:18 +0100
From:   Colin King <colin.king@...onical.com>
To:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Tejun Heo <tj@...nel.org>, linux-ide@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ata: pata_artop: remove redundant initialization of pio

From: Colin Ian King <colin.king@...onical.com>

pio is initialized and the data is never read, instead it is almost
immediately being updated to a new value. Fix this by removing the
initialization.

Detected by scan-build:
"warning: Value stored to 'pio' during its initialization is never read"

Fixes: 669a5db411d8 ("[libata] Add a bunch of PATA drivers")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/ata/pata_artop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c
index 96c05c9494fa..6b3355343542 100644
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -242,7 +242,7 @@ static void artop6210_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 
 static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev)
 {
-	unsigned int pio	= adev->pio_mode - XFER_PIO_0;
+	unsigned int pio;
 	struct pci_dev *pdev	= to_pci_dev(ap->host->dev);
 	u8 ultra;
 
-- 
2.14.1