Commit 12d32064 authored by Lin Ming's avatar Lin Ming Committed by Len Brown
Browse files

ACPI: fix allowing to add/remove multiple _OSI strings 



commit b0ed7a91(ACPICA/ACPI: Add new host interfaces for _OSI suppor)
introduced another regression that only one _OSI string can be added or
removed.

Now multiple _OSI strings can be added or removed, for example

acpi_osi=Linux acpi_osi=FreeBSD acpi_osi="!Windows 2006"

Signed-off-by: default avatarLin Ming <ming.m.lin@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent d90aa92c

drivers/acpi/osl.c

+50 −16
Original line number Diff line number Diff line
@@ -110,9 +110,6 @@ struct acpi_ioremap { 
static LIST_HEAD(acpi_ioremaps);

static DEFINE_SPINLOCK(acpi_ioremap_lock);



#define	OSI_STRING_LENGTH_MAX 64	/* arbitrary */

static char osi_setup_string[OSI_STRING_LENGTH_MAX];



static void __init acpi_osi_setup_late(void);



/*
@@ -1054,16 +1051,47 @@ static int __init acpi_os_name_setup(char *str) 


__setup("acpi_os_name=", acpi_os_name_setup);



#define	OSI_STRING_LENGTH_MAX 64	/* arbitrary */

#define	OSI_STRING_ENTRIES_MAX 16	/* arbitrary */



struct osi_setup_entry {

	char string[OSI_STRING_LENGTH_MAX];

	bool enable;

};



static struct osi_setup_entry __initdata osi_setup_entries[OSI_STRING_ENTRIES_MAX];



void __init acpi_osi_setup(char *str)

{

	struct osi_setup_entry *osi;

	bool enable = true;

	int i;



	if (!acpi_gbl_create_osi_method)

		return;



	if (str == NULL || *str == '\0') {

		printk(KERN_INFO PREFIX "_OSI method disabled\n");

		acpi_gbl_create_osi_method = FALSE;

	} else

		strncpy(osi_setup_string, str, OSI_STRING_LENGTH_MAX);

		return;

	}



	if (*str == '!') {

		str++;

		enable = false;

	}



	for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {

		osi = &osi_setup_entries[i];

		if (!strcmp(osi->string, str)) {

			osi->enable = enable;

			break;

		} else if (osi->string[0] == '\0') {

			osi->enable = enable;

			strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);

			break;

		}

	}

}



static void __init set_osi_linux(unsigned int enable)
@@ -1110,22 +1138,28 @@ void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) 
 */

static void __init acpi_osi_setup_late(void)

{

	char *str = osi_setup_string;

	struct osi_setup_entry *osi;

	char *str;

	int i;

	acpi_status status;



	if (*str == '\0')

		return;

	for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {

		osi = &osi_setup_entries[i];

		str = osi->string;



	if (*str == '!') {

		status = acpi_remove_interface(++str);

		if (*str == '\0')

			break;

		if (osi->enable) {

			status = acpi_install_interface(str);



			if (ACPI_SUCCESS(status))

			printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);

				printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);

		} else {

		status = acpi_install_interface(str);

			status = acpi_remove_interface(str);



			if (ACPI_SUCCESS(status))

			printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);

				printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);

		}

	}

}

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