Check the kernel runtime pm status to see if a drive is sleeping
before attempting the ata CHECK POWER command.
---
src/udiskslinuxdriveata.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/src/udiskslinuxdriveata.c b/src/udiskslinuxdriveata.c
index 1575b3d..6d42d48 100644
--- a/src/udiskslinuxdriveata.c
+++ b/src/udiskslinuxdriveata.c
@@ -427,6 +427,26 @@ selftest_status_to_string (SkSmartSelfTestExecutionStatus
status)
return ret;
}
+static gchar *
+get_sysfs_attr (GUdevDevice *device,
+ const gchar *attr)
+{
+ gchar *filename;
+ gchar *value;
+ filename = g_strconcat (g_udev_device_get_sysfs_path (device),
+ "/",
+ attr,
+ NULL);
+ value = NULL;
+ /* don't care about errors */
+ g_file_get_contents (filename,
+ &value,
+ NULL,
+ NULL);
+ g_free (filename);
+ return value;
+}
+
static gboolean get_pm_state (UDisksLinuxDevice *device, GError **error,
guchar *count)
{
int fd = open (g_udev_device_get_device_file (device->udev_device),
O_RDONLY|O_NONBLOCK);
@@ -434,7 +454,15 @@ static gboolean get_pm_state (UDisksLinuxDevice *device,
GError **error, guchar
/* ATA8: 7.8 CHECK POWER MODE - E5h, Non-Data */
UDisksAtaCommandInput input = {.command = 0xe5};
UDisksAtaCommandOutput output = {0};
+ gchar *rt_status;
+ rt_status = get_sysfs_attr(device->udev_device,
"device/power/runtime_status");
+ if (rt_status && g_str_has_prefix (rt_status, "suspend"))
+ {
+ *count = 0;
+ rc = TRUE;
+ goto out;
+ }
if (fd == -1)
{
g_set_error (error, UDISKS_ERROR, UDISKS_ERROR_FAILED,
@@ -459,6 +487,8 @@ static gboolean get_pm_state (UDisksLinuxDevice *device,
GError **error, guchar
out:
if (fd != -1)
close(fd);
+ if (rt_status)
+ g_free (rt_status);
return rc;
}
--
1.8.3.2
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