linux-kernel - [PATCH 1/2] scsi/ufs: reverse the ufshcd_is_device

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Date:	Fri, 6 Apr 2012 10:57:08 +0530
From:	Venkatraman S <svenkatr@...com>
To:	<linux-kernel@...r.kernel.org>
CC:	Venkatraman S <svenkatr@...com>, Santosh Y <santoshsy@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 1/2] scsi/ufs: reverse the ufshcd_is_device_present logic

 Otherwise it counter intuitively returns 0 if device is present.

Signed-off-by: Venkatraman S <svenkatr@...com>
CC: Santosh Y <santoshsy@...il.com>
CC: Andrew Morton <akpm@...ux-foundation.org>
---
 drivers/scsi/ufs/ufshcd.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 52b96e8..aa97200 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -232,11 +232,11 @@ static inline u32 ufshcd_get_ufs_version(struct ufs_hba *hba)
  *			      the host controller
  * @reg_hcs - host controller status register value
  *
- * Returns 0 if device present, non-zero if no device detected
+ * Returns 1 if device present, 0 if no device detected
  */
 static inline int ufshcd_is_device_present(u32 reg_hcs)
 {
-	return (DEVICE_PRESENT & reg_hcs) ? 0 : -1;
+	return (DEVICE_PRESENT & reg_hcs) ? 1 : 0;
 }
 
 /**
@@ -911,7 +911,7 @@ static int ufshcd_make_hba_operational(struct ufs_hba *hba)
 
 	/* check if device present */
 	reg = readl((hba->mmio_base + REG_CONTROLLER_STATUS));
-	if (ufshcd_is_device_present(reg)) {
+	if (!ufshcd_is_device_present(reg)) {
 		dev_err(&hba->pdev->dev, "cc: Device not present\n");
 		err = -ENXIO;
 		goto out;
-- 
1.7.5.4

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