Patch "Revert "ata: sata_mv: Convert to devm_ioremap_resource()"" has been added to the 4.11-stable tree

Patch "Revert "ata: sata_mv: Convert to devm_ioremap_resource()"" has been added to the 4.11-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    Revert "ata: sata_mv: Convert to devm_ioremap_resource()"

to the 4.11-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     revert-ata-sata_mv-convert-to-devm_ioremap_resource.patch
and it can be found in the queue-4.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 3e4240da0e3673637c1c995bdd14cfdbc8f4dc4c Mon Sep 17 00:00:00 2001
From: Andrew Lunn <andrew@lunn.ch>
Date: Wed, 24 May 2017 01:39:35 +0200
Subject: Revert "ata: sata_mv: Convert to devm_ioremap_resource()"

From: Andrew Lunn <andrew@lunn.ch>

commit 3e4240da0e3673637c1c995bdd14cfdbc8f4dc4c upstream.

This reverts commit 368e5fbdfc60732643f34f538823ed4bc8829827.

devm_ioremap_resource() enforces that there are no overlapping
resources, where as devm_ioremap() does not. The sata phy driver needs
a subset of the sata IO address space, so maps some of the sata
address space. As a result, sata_mv now fails to probe, reporting it
cannot get its resources, and so we don't have any SATA disks.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/ata/sata_mv.c |   13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -4067,7 +4067,6 @@ static int mv_platform_probe(struct plat
 	struct ata_host *host;
 	struct mv_host_priv *hpriv;
 	struct resource *res;
-	void __iomem *mmio;
 	int n_ports = 0, irq = 0;
 	int rc;
 	int port;
@@ -4086,9 +4085,8 @@ static int mv_platform_probe(struct plat
 	 * Get the register base first
 	 */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	mmio = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(mmio))
-		return PTR_ERR(mmio);
+	if (res == NULL)
+		return -EINVAL;
 
 	/* allocate host */
 	if (pdev->dev.of_node) {
@@ -4132,7 +4130,12 @@ static int mv_platform_probe(struct plat
 	hpriv->board_idx = chip_soc;
 
 	host->iomap = NULL;
-	hpriv->base = mmio - SATAHC0_REG_BASE;
+	hpriv->base = devm_ioremap(&pdev->dev, res->start,
+				   resource_size(res));
+	if (!hpriv->base)
+		return -ENOMEM;
+
+	hpriv->base -= SATAHC0_REG_BASE;
 
 	hpriv->clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(hpriv->clk))


Patches currently in stable-queue which might be from andrew@lunn.ch are

queue-4.11/revert-ata-sata_mv-convert-to-devm_ioremap_resource.patch