linux-kernel - [PATCH] libata: Shut up annoying native

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Date:	Thu, 20 Dec 2012 13:25:55 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Borislav Petkov <bp@...en8.de>, Jeff Garzik <jgarzik@...ox.com>,
	linux-ide@...r.kernel.org
Subject: [PATCH] libata: Shut up annoying native_sectors warning

I'm getting this

drivers/ata/libata-core.c: In function ‘ata_hpa_resize’:
drivers/ata/libata-core.c:1397:3: warning: ‘native_sectors’ may be used uninitialized in this function [-Wmaybe-uninitialized]

for a couple of kernel releases now with gcc (Debian 4.7.2-4) 4.7.2.

And the warning is bogus because ata_read_native_max_address either
returns a sensible max_sectors aka native_sectors through its second
arg pointer or an error value which is properly handled in its caller
ata_hpa_resize().

So shut up gcc already.

Cc: Jeff Garzik <jgarzik@...ox.com>
Cc: linux-ide@...r.kernel.org
Signed-off-by: Borislav Petkov <bp@...en8.de>
---
 drivers/ata/libata-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 9e8b99af400d..3860f6be8c19 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1324,7 +1324,7 @@ static int ata_hpa_resize(struct ata_device *dev)
 	int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
 	bool unlock_hpa = ata_ignore_hpa || dev->flags & ATA_DFLAG_UNLOCK_HPA;
 	u64 sectors = ata_id_n_sectors(dev->id);
-	u64 native_sectors;
+	u64 native_sectors = 0;
 	int rc;
 
 	/* do we need to do it? */
-- 
1.8.1.rc2

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