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authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>2007-04-27 22:00:15 -0300
committerLen Brown <len.brown@intel.com>2007-04-28 21:41:20 -0400
commitd94a7f16cad7700f8d2b142cc13cfba5387af3db (patch)
treec05c534bb1ef98a5c45321a107c8cd28894f0e84 /drivers/misc
parent5ae930e685018e2dc6d4139362213e4b283e5700 (diff)
downloadlinux-d94a7f16cad7700f8d2b142cc13cfba5387af3db.tar.bz2
ACPI: thinkpad-acpi: improve dock subdriver initialization
The dock sub-driver has split-personality (two subdrivers), and it was doing some unoptimal things on init because of that. Fix it so that the second half of it will only init when necessary, and only if the first half initialized sucessfully in the first place. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/thinkpad_acpi.c78
1 files changed, 50 insertions, 28 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 68f1cc0d7fae..a56526500c18 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1519,6 +1519,33 @@ IBM_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
/* don't list other alternatives as we install a notify handler on the 570 */
IBM_HANDLE(pci, root, "\\_SB.PCI"); /* 570 */
+static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
+ {
+ .notify = dock_notify,
+ .handle = &dock_handle,
+ .type = ACPI_SYSTEM_NOTIFY,
+ },
+ {
+ .hid = IBM_PCI_HID,
+ .notify = dock_notify,
+ .handle = &pci_handle,
+ .type = ACPI_SYSTEM_NOTIFY,
+ },
+};
+
+static struct ibm_struct dock_driver_data[2] = {
+ {
+ .name = "dock",
+ .read = dock_read,
+ .write = dock_write,
+ .acpi = &ibm_dock_acpidriver[0],
+ },
+ {
+ .name = "dock",
+ .acpi = &ibm_dock_acpidriver[1],
+ },
+};
+
#define dock_docked() (_sta(dock_handle) & 1)
static int __init dock_init(struct ibm_init_struct *iibm)
@@ -1526,7 +1553,6 @@ static int __init dock_init(struct ibm_init_struct *iibm)
vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
IBM_ACPIHANDLE_INIT(dock);
- IBM_ACPIHANDLE_INIT(pci);
vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
str_supported(dock_handle != NULL));
@@ -1534,6 +1560,28 @@ static int __init dock_init(struct ibm_init_struct *iibm)
return (dock_handle)? 0 : 1;
}
+static int __init dock_init2(struct ibm_init_struct *iibm)
+{
+ int dock2_needed;
+
+ vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
+
+ if (dock_driver_data[0].flags.acpi_driver_registered &&
+ dock_driver_data[0].flags.acpi_notify_installed) {
+ IBM_ACPIHANDLE_INIT(pci);
+ dock2_needed = (pci_handle != NULL);
+ vdbg_printk(TPACPI_DBG_INIT,
+ "dock PCI handler for the TP 570 is %s\n",
+ str_supported(dock2_needed));
+ } else {
+ vdbg_printk(TPACPI_DBG_INIT,
+ "dock subdriver part 2 not required\n");
+ dock2_needed = 0;
+ }
+
+ return (dock2_needed)? 0 : 1;
+}
+
static void dock_notify(struct ibm_struct *ibm, u32 event)
{
int docked = dock_docked();
@@ -1595,33 +1643,6 @@ static int dock_write(char *buf)
return 0;
}
-static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
- {
- .notify = dock_notify,
- .handle = &dock_handle,
- .type = ACPI_SYSTEM_NOTIFY,
- },
- {
- .hid = IBM_PCI_HID,
- .notify = dock_notify,
- .handle = &pci_handle,
- .type = ACPI_SYSTEM_NOTIFY,
- },
-};
-
-static struct ibm_struct dock_driver_data[2] = {
- {
- .name = "dock",
- .read = dock_read,
- .write = dock_write,
- .acpi = &ibm_dock_acpidriver[0],
- },
- {
- .name = "dock",
- .acpi = &ibm_dock_acpidriver[1],
- },
-};
-
#endif /* CONFIG_THINKPAD_ACPI_DOCK */
/*************************************************************************
@@ -3850,6 +3871,7 @@ static struct ibm_init_struct ibms_init[] __initdata = {
.data = &dock_driver_data[0],
},
{
+ .init = dock_init2,
.data = &dock_driver_data[1],
},
#endif