linux-kernel - [PATCH 4.4 174/312] VFIO: platform: reset: fix a warning message condition

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Date:   Fri,  8 May 2020 14:32:45 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Eric Auger <eric.auger@...aro.org>,
        Alex Williamson <alex.williamson@...hat.com>
Subject: [PATCH 4.4 174/312] VFIO: platform: reset: fix a warning message condition

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 967628827f404b3063016c138ccc7b06c54350f8 upstream.

This loop ends with count set to -1 and not zero so the warning message
isn't printed when it should be.  I've fixed this by change the postop
to a preop.

Fixes: 0990822c9866 ('VFIO: platform: reset: AMD xgbe reset module')
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Eric Auger <eric.auger@...aro.org>
Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/vfio/platform/reset/vfio_platform_amdxgbe.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/vfio/platform/reset/vfio_platform_amdxgbe.c
+++ b/drivers/vfio/platform/reset/vfio_platform_amdxgbe.c
@@ -110,7 +110,7 @@ int vfio_platform_amdxgbe_reset(struct v
 	usleep_range(10, 15);
 
 	count = 2000;
-	while (count-- && (ioread32(xgmac_regs->ioaddr + DMA_MR) & 1))
+	while (--count && (ioread32(xgmac_regs->ioaddr + DMA_MR) & 1))
 		usleep_range(500, 600);
 
 	if (!count)