linux-kernel - [PATCH 4.12 09/84] liquidio: fix bug in soft reset failure detection

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Date:   Wed, 19 Jul 2017 11:43:15 +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, Derek Chickles <derek.chickles@...ium.com>,
        Satanand Burla <satananda.burla@...ium.com>,
        Raghu Vatsavayi <raghu.vatsavayi@...ium.com>,
        Felix Manlunas <felix.manlunas@...ium.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.12 09/84] liquidio: fix bug in soft reset failure detection

4.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Derek Chickles <derek.chickles@...ium.com>


[ Upstream commit 05a6b4cae8c0cc1680c9dd33a97a49a13c0f01bc ]

The code that detects a failed soft reset of Octeon is comparing the wrong
value against the reset value of the Octeon SLI_SCRATCH_1 register,
resulting in an inability to detect a soft reset failure.  Fix it by using
the correct value in the comparison, which is any non-zero value.

Fixes: f21fb3ed364b ("Add support of Cavium Liquidio ethernet adapters")
Fixes: c0eab5b3580a ("liquidio: CN23XX firmware download")
Signed-off-by: Derek Chickles <derek.chickles@...ium.com>
Signed-off-by: Satanand Burla <satananda.burla@...ium.com>
Signed-off-by: Raghu Vatsavayi <raghu.vatsavayi@...ium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@...ium.com>
Reviewed-by: Leon Romanovsky <leonro@...lanox.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c |    2 +-
 drivers/net/ethernet/cavium/liquidio/cn66xx_device.c    |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c
+++ b/drivers/net/ethernet/cavium/liquidio/cn23xx_pf_device.c
@@ -221,7 +221,7 @@ static int cn23xx_pf_soft_reset(struct o
 	/* Wait for 100ms as Octeon resets. */
 	mdelay(100);
 
-	if (octeon_read_csr64(oct, CN23XX_SLI_SCRATCH1) == 0x1234ULL) {
+	if (octeon_read_csr64(oct, CN23XX_SLI_SCRATCH1)) {
 		dev_err(&oct->pci_dev->dev, "OCTEON[%d]: Soft reset failed\n",
 			oct->octeon_id);
 		return 1;
--- a/drivers/net/ethernet/cavium/liquidio/cn66xx_device.c
+++ b/drivers/net/ethernet/cavium/liquidio/cn66xx_device.c
@@ -44,7 +44,7 @@ int lio_cn6xxx_soft_reset(struct octeon_
 	/* Wait for 10ms as Octeon resets. */
 	mdelay(100);
 
-	if (octeon_read_csr64(oct, CN6XXX_SLI_SCRATCH1) == 0x1234ULL) {
+	if (octeon_read_csr64(oct, CN6XXX_SLI_SCRATCH1)) {
 		dev_err(&oct->pci_dev->dev, "Soft reset failed\n");
 		return 1;
 	}