From dc8b4afc4a04fac8ee55a19b59f2356a25e7e778 Mon Sep 17 00:00:00 2001
From: Manuel Lauss <manuel.lauss@gmail.com>
Date: Sat, 27 Feb 2016 16:10:05 +0100
Subject: [PATCH] ata: ahci: don't mark HotPlugCapable Ports as
external/removable
The HPCP bit is set by bioses for on-board sata ports either because
they think sata is hotplug capable in general or to allow Windows
to display a "device eject" icon on ports which are routed to an
external connector bracket.
However in Redhat Bugzilla #1310682, users report that with kernel 4.4,
where this bit test first appeared, a lot of partitions on sata drives
are now mounted automatically.
This patch should fix redhat and a lot of other distros which
unconditionally automount all devices which have the "removable"
bit set.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 8a3e33cf92c7 ("ata: ahci: find eSATA ports and flag them as removable" changes userspace behavior)
Link: http://lkml.kernel.org/g/56CF35FA.1070500@redhat.com
Cc: stable@vger.kernel.org #v4.4+
---
drivers/ata/libahci.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 513b3fa74d788..85ea5142a0951 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -1168,8 +1168,7 @@ static void ahci_port_init(struct device *dev, struct ata_port *ap,
/* mark esata ports */
tmp = readl(port_mmio + PORT_CMD);
- if ((tmp & PORT_CMD_HPCP) ||
- ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS)))
+ if ((tmp & PORT_CMD_ESP) && (hpriv->cap & HOST_CAP_SXS))
ap->pflags |= ATA_PFLAG_EXTERNAL;
}
--
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