3.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Gwendal Grignou <gwendal@xxxxxxxxxx>
commit 3e85c3ecbc520751324a191d23bb94873ed01b10 upstream.
6.0 Gbps link speed was not decoded properly:
speed was reported at 3.0 Gbps only.
Tested: On a machine where libata reports 6.0 Gbps in
/var/log/messages:
ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
Before:
cat /sys/class/ata_link/link1/sata_spd
3.0 Gbps
After:
cat /sys/class/ata_link/link1/sata_spd
6.0 Gbps
Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/ata/libata-transport.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
--- a/drivers/ata/libata-transport.c
+++ b/drivers/ata/libata-transport.c
@@ -321,25 +321,25 @@ int ata_tport_add(struct device *parent,
/*
* ATA link attributes
*/
+static int noop(int x) { return x; }
-
-#define ata_link_show_linkspeed(field) \
+#define ata_link_show_linkspeed(field, format) \
static ssize_t \
show_ata_link_##field(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct ata_link *link = transport_class_to_link(dev); \
\
- return sprintf(buf,"%s\n", sata_spd_string(fls(link->field))); \
+ return sprintf(buf, "%s\n", sata_spd_string(format(link->field))); \
}
-#define ata_link_linkspeed_attr(field) \
- ata_link_show_linkspeed(field) \
+#define ata_link_linkspeed_attr(field, format) \
+ ata_link_show_linkspeed(field, format) \
static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
-ata_link_linkspeed_attr(hw_sata_spd_limit);
-ata_link_linkspeed_attr(sata_spd_limit);
-ata_link_linkspeed_attr(sata_spd);
+ata_link_linkspeed_attr(hw_sata_spd_limit, fls);
+ata_link_linkspeed_attr(sata_spd_limit, fls);
+ata_link_linkspeed_attr(sata_spd, noop);
static DECLARE_TRANSPORT_CLASS(ata_link_class,
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