diff options
| author | Toshi Kani <toshi.kani@hp.com> | 2013-03-13 19:29:26 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-03-25 00:18:43 +0100 |
| commit | 882fd12e641b612bcf31620f9b1b7bb03f8e9ab5 (patch) | |
| tree | e9814f8c21c4f07a7a028c6c872c5fefc4d0d9ef /drivers/acpi/scan.c | |
| parent | ea6a4581ce11bd1a5dca421c01b11d1ff2867c2f (diff) | |
ACPI: Verify device status after eject
ACPI spec states that the OS evaluates _STA after calling _EJ0
in order to verify if eject was successful. Added a check to
verify if the enabled bit of the status value is cleared after
_EJ0.
Note, the present bit is not checked since some FW implementations
do not clear the present bit until the hardware is physically
removed.
Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/scan.c')
| -rw-r--r-- | drivers/acpi/scan.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index dfdbcfdd9def..8cacc16af6e7 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -127,6 +127,7 @@ static int acpi_scan_hot_remove(struct acpi_device *device) struct acpi_object_list arg_list; union acpi_object arg; acpi_status status; + unsigned long long sta; /* If there is no handle, the device node has been unregistered. */ if (!handle) { @@ -164,10 +165,25 @@ static int acpi_scan_hot_remove(struct acpi_device *device) if (status == AE_NOT_FOUND) { return -ENODEV; } else { - acpi_handle_warn(handle, "Eject failed\n"); + acpi_handle_warn(handle, "Eject failed (0x%x)\n", + status); return -EIO; } } + + /* + * Verify if eject was indeed successful. If not, log an error + * message. No need to call _OST since _EJ0 call was made OK. + */ + status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); + if (ACPI_FAILURE(status)) { + acpi_handle_warn(handle, + "Status check after eject failed (0x%x)\n", status); + } else if (sta & ACPI_STA_DEVICE_ENABLED) { + acpi_handle_warn(handle, + "Eject incomplete - status 0x%llx\n", sta); + } + return 0; } |