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libata-acpi: adjust constness in ata_acpi_gtm/stm() parameters

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* No internal function uses const ata_port.  Drop const from @ap.

* Make ata_acpi_stm() copy @stm before using it and change @stm to
  const.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo 2007-12-15 15:04:57 +09:00 committed by Jeff Garzik
parent 4e5200334e
commit 0d02f0b22b
2 changed files with 6 additions and 5 deletions
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7
drivers/ata/libata-acpi.c
View File

@ -200,7 +200,7 @@ void ata_acpi_associate(struct ata_host *host)
* RETURNS:
* 0 on success, -ENOENT if _GTM doesn't exist, -errno on failure.
*/
int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *gtm)
int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *gtm)
{
struct acpi_buffer output = { .length = ACPI_ALLOCATE_BUFFER };
union acpi_object *out_obj;
@ -259,15 +259,16 @@ EXPORT_SYMBOL_GPL(ata_acpi_gtm);
* RETURNS:
* 0 on success, -ENOENT if _STM doesn't exist, -errno on failure.
*/
int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm)
int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm)
{
acpi_status status;
struct ata_acpi_gtm stm_buf = *stm;
struct acpi_object_list input;
union acpi_object in_params[3];
in_params[0].type = ACPI_TYPE_BUFFER;
in_params[0].buffer.length = sizeof(struct ata_acpi_gtm);
in_params[0].buffer.pointer = (u8 *)stm;
in_params[0].buffer.pointer = (u8 *)&stm_buf;
/* Buffers for id may need byteswapping ? */
in_params[1].type = ACPI_TYPE_BUFFER;
in_params[1].buffer.length = 512;

4
include/linux/libata.h
View File

@ -940,8 +940,8 @@ enum {
/* libata-acpi.c */
#ifdef CONFIG_ATA_ACPI
extern int ata_acpi_cbl_80wire(struct ata_port *ap);
int ata_acpi_stm(const struct ata_port *ap, struct ata_acpi_gtm *stm);
int ata_acpi_gtm(const struct ata_port *ap, struct ata_acpi_gtm *stm);
int ata_acpi_stm(struct ata_port *ap, const struct ata_acpi_gtm *stm);
int ata_acpi_gtm(struct ata_port *ap, struct ata_acpi_gtm *stm);
#else
static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
#endif