linux-kernel - [PATCH 3.2 11/46] libahci: save port map for forced port map

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Message-ID: <lsq.1465767281.698122656@decadent.org.uk>
Date:	Sun, 12 Jun 2016 22:34:41 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Andy Gross" <andy.gross@...aro.org>,
	"Tejun Heo" <tj@...nel.org>,
	"Srinivas Kandagatla" <srinivas.kandagatla@...aro.org>
Subject: [PATCH 3.2 11/46] libahci: save port map for forced port map

3.2.81-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>

commit 2fd0f46cb1b82587c7ae4a616d69057fb9bd0af7 upstream.

In usecases where force_port_map is used saved_port_map is never set,
resulting in not programming the PORTS_IMPL register as part of initial
config. This patch fixes this by setting it to port_map even in case
where force_port_map is used, making it more inline with other parts of
the code.

Fixes: 566d1827df2e ("libata: disable forced PORTS_IMPL for >= AHCI 1.3")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Acked-by: Tejun Heo <tj@...nel.org>
Reviewed-by: Andy Gross <andy.gross@...aro.org>
Signed-off-by: Tejun Heo <tj@...nel.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/ata/libahci.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -452,6 +452,7 @@ void ahci_save_initial_config(struct dev
 		dev_info(dev, "forcing port_map 0x%x -> 0x%x\n",
 			 port_map, force_port_map);
 		port_map = force_port_map;
+		hpriv->saved_port_map = port_map;
 	}
 
 	if (mask_port_map) {