Re: [2.6.20-rc4 regression] ibm-acpi: bay support disabled

[Henrique de Moraes Holschuh <hmh@hmh.eng.br>]

On Tue, 09 Jan 2007, Adrian Bunk wrote:
> > diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> > index 1639998..34cc8d5 100644
> > --- a/drivers/acpi/Kconfig
> > +++ b/drivers/acpi/Kconfig
> > @@ -215,26 +215,29 @@ config ACPI_IBM
> >  config ACPI_IBM_DOCK
> >  	bool "Legacy Docking Station Support"
> >  	depends on ACPI_IBM
> > -	depends on ACPI_DOCK=n
> > -	default n
> > +	depends on ! ACPI_DOCK
> > +	default y
> >...
> 
> !ACPI_DOCK is wrong if the intention was ACPI_DOCK=n (since ACPI_DOCK is 
> a tristate).

Actually, the intention is to give a sensible default AND to avoid
ACPI_DOCK=y && ACPI_IBM_DOCK=y.  The same goes for ACPI_BAY.  An user is
certainly entitled to have both as modules (e.g. to see if ACPI_DOCK or
ACPI_BAY works in his ThinkPad).

Even better would be to detect it at runtime, and disable the specific
support in ibm-acpi if the generic support is loaded.  But that's something
to try in -mm and target 2.6.21 or 2.6.22.

> I'd say the right fix is to remove the negative dependencies on unmerged 
> options and reintroduce them once these options themselves got merged.

Well, as long as the regression is fixed, I am happy.  Here is an
alternative patch, that reverts the problematic commit,
2df910b4c3edcce9a0c12394db6f5f4a6e69c712.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

From: Henrique de Moraes Holschuh <hmh@hmh.eng.br>

ACPI: ibm-acpi: allow bay support to work in mainline

This patch reverts commit 2df910b4c3edcce9a0c12394db6f5f4a6e69c712.

ACPI_BAY has not been merged into mainline yet, so the changes to ibm-acpi
related Kconfig entries that depend on ACPI_BAY were permanently disabling
ibm-acpi bay support.  This is a serious regression for ThinkPad users.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
---
 drivers/acpi/Kconfig    |   11 -----------
 drivers/acpi/ibm_acpi.c |   13 +------------
 2 files changed, 1 insertions(+), 23 deletions(-)

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 1639998..f4f000a 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -225,17 +225,6 @@ config ACPI_IBM_DOCK
 
 	  If you are not sure, say N here.
 
-config ACPI_IBM_BAY
-	bool "Legacy Removable Bay Support"
-	depends on ACPI_IBM
-	depends on ACPI_BAY=n
-	default n
-	---help---
-	  Allows the ibm_acpi driver to handle removable bays.
-	  This support is obsoleted by CONFIG_ACPI_BAY.
-
-	  If you are not sure, say N here.
-
 config ACPI_TOSHIBA
 	tristate "Toshiba Laptop Extras"
 	depends on X86
diff --git a/drivers/acpi/ibm_acpi.c b/drivers/acpi/ibm_acpi.c
index b72d13d..c6144ca 100644
--- a/drivers/acpi/ibm_acpi.c
+++ b/drivers/acpi/ibm_acpi.c
@@ -157,7 +157,6 @@ IBM_HANDLE(dock, root, "\\_SB.GDCK",	/* X30, X31, X40 */
 	   "\\_SB.PCI.ISA.SLCE",	/* 570 */
     );				/* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
 #endif
-#ifdef CONFIG_ACPI_IBM_BAY
 IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",	/* 570 */
 	   "\\_SB.PCI0.IDE0.IDES.IDSM",	/* 600e/x, 770e, 770x */
 	   "\\_SB.PCI0.SATA.SCND.MSTR",	/* T60, X60, Z60 */ 
@@ -175,7 +174,6 @@ IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",	/* A3x, R32 */
 IBM_HANDLE(bay2_ej, bay2, "_EJ3",	/* 600e/x, 770e, A3x */
 	   "_EJ0",		/* 770x */
     );				/* all others */
-#endif
 
 /* don't list other alternatives as we install a notify handler on the 570 */
 IBM_HANDLE(pci, root, "\\_SB.PCI");	/* 570 */
@@ -1042,7 +1040,6 @@ static int light_write(char *buf)
 	return 0;
 }
 
-#if defined(CONFIG_ACPI_IBM_DOCK) || defined(CONFIG_ACPI_IBM_BAY)
 static int _sta(acpi_handle handle)
 {
 	int status;
@@ -1052,7 +1049,7 @@ static int _sta(acpi_handle handle)
 
 	return status;
 }
-#endif
+
 #ifdef CONFIG_ACPI_IBM_DOCK
 #define dock_docked() (_sta(dock_handle) & 1)
 
@@ -1118,7 +1115,6 @@ static void dock_notify(struct ibm_struct *ibm, u32 event)
 }
 #endif
 
-#ifdef CONFIG_ACPI_IBM_BAY
 static int bay_status_supported;
 static int bay_status2_supported;
 static int bay_eject_supported;
@@ -1194,7 +1190,6 @@ static void bay_notify(struct ibm_struct *ibm, u32 event)
 {
 	acpi_bus_generate_event(ibm->device, event, 0);
 }
-#endif
 
 static int cmos_read(char *p)
 {
@@ -2354,7 +2349,6 @@ static struct ibm_struct ibms[] = {
 	 .type = ACPI_SYSTEM_NOTIFY,
 	 },
 #endif
-#ifdef CONFIG_ACPI_IBM_BAY
 	{
 	 .name = "bay",
 	 .init = bay_init,
@@ -2364,7 +2358,6 @@ static struct ibm_struct ibms[] = {
 	 .handle = &bay_handle,
 	 .type = ACPI_SYSTEM_NOTIFY,
 	 },
-#endif
 	{
 	 .name = "cmos",
 	 .read = cmos_read,
@@ -2650,9 +2643,7 @@ IBM_PARAM(light);
 #ifdef CONFIG_ACPI_IBM_DOCK
 IBM_PARAM(dock);
 #endif
-#ifdef CONFIG_ACPI_IBM_BAY
 IBM_PARAM(bay);
-#endif
 IBM_PARAM(cmos);
 IBM_PARAM(led);
 IBM_PARAM(beep);
@@ -2735,14 +2726,12 @@ static int __init acpi_ibm_init(void)
 	IBM_HANDLE_INIT(dock);
 #endif
 	IBM_HANDLE_INIT(pci);
-#ifdef CONFIG_ACPI_IBM_BAY
 	IBM_HANDLE_INIT(bay);
 	if (bay_handle)
 		IBM_HANDLE_INIT(bay_ej);
 	IBM_HANDLE_INIT(bay2);
 	if (bay2_handle)
 		IBM_HANDLE_INIT(bay2_ej);
-#endif
 	IBM_HANDLE_INIT(beep);
 	IBM_HANDLE_INIT(ecrd);
 	IBM_HANDLE_INIT(ecwr);
-- 
1.4.4.3