linux-kernel - [PATCH v2 1/2] ata: ahci_brcm: Perform reset after obtaining resources

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200106191906.18266-2-f.fainelli@gmail.com>
Date:   Mon,  6 Jan 2020 11:19:05 -0800
From:   Florian Fainelli <f.fainelli@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     bcm-kernel-feedback-list@...adcom.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Jens Axboe <axboe@...nel.dk>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Hans de Goede <hdegoede@...hat.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Tejun Heo <tj@...nel.org>, Jaedon Shin <jaedon.shin@...il.com>,
        linux-ide@...r.kernel.org (open list:LIBATA SUBSYSTEM (Serial and
        Parallel ATA drivers)),
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS)
Subject: [PATCH v2 1/2] ata: ahci_brcm: Perform reset after obtaining resources

Resources such as clocks, PHYs, regulators are likely to get a probe
deferral return code, which could lead to the AHCI controller being
reset a few times until it gets successfully probed. Since this is
typically the most time consuming operation, move it after the resources
have been acquired.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/ata/ahci_brcm.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/ata/ahci_brcm.c b/drivers/ata/ahci_brcm.c
index 13ceca687104..70e3e386d52e 100644
--- a/drivers/ata/ahci_brcm.c
+++ b/drivers/ata/ahci_brcm.c
@@ -453,15 +453,9 @@ static int brcm_ahci_probe(struct platform_device *pdev)
 	else
 		reset_name = "ahci";
 
-	priv->rcdev = devm_reset_control_get(&pdev->dev, reset_name);
-	if (!IS_ERR_OR_NULL(priv->rcdev))
-		reset_control_deassert(priv->rcdev);
-
 	hpriv = ahci_platform_get_resources(pdev, 0);
-	if (IS_ERR(hpriv)) {
-		ret = PTR_ERR(hpriv);
-		goto out_reset;
-	}
+	if (IS_ERR(hpriv))
+		return PTR_ERR(hpriv);
 
 	hpriv->plat_data = priv;
 	hpriv->flags = AHCI_HFLAG_WAKE_BEFORE_STOP | AHCI_HFLAG_NO_WRITE_TO_RO;
@@ -478,6 +472,10 @@ static int brcm_ahci_probe(struct platform_device *pdev)
 		break;
 	}
 
+	priv->rcdev = devm_reset_control_get(&pdev->dev, reset_name);
+	if (!IS_ERR_OR_NULL(priv->rcdev))
+		reset_control_deassert(priv->rcdev);
+
 	ret = ahci_platform_enable_clks(hpriv);
 	if (ret)
 		goto out_reset;
-- 
2.17.1