This patch fixes a problem that when a computer with HPA on it's hard
drive comes out of sleep mode it needs the disks capacity reinitialized.
This is my first patch to the Linux kernel so if I did anything wrong
please be gentle ;)
Lee Trager
diff -Naur linux-2.6.18-rc4-old/include/linux/ide.h
linux-2.6.18-rc4/include/linux/ide.h
--- linux-2.6.18-rc4-old/include/linux/ide.h 2006-08-19
03:49:03.000000000 -0400
+++ linux-2.6.18-rc4/include/linux/ide.h 2006-08-20
19:13:10.000000000 -0400
@@ -1201,6 +1201,17 @@
void ide_register_subdriver(ide_drive_t *, ide_driver_t *);
void ide_unregister_subdriver(ide_drive_t *, ide_driver_t *);
+/* Bits 10 of command_set_1 and cfs_enable_1 must be equal,
+ * so on non-buggy drives we need test only one.
+ * However, we should also check whether these fields are valid.
+*/
+static inline int idedisk_supports_hpa(const struct hd_driveid *id)
+{
+ return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400);
+}
+
+extern void init_idedisk_capacity (ide_drive_t *drive);
+
#define ON_BOARD 1
#define NEVER_BOARD 0
diff -Naur linux-2.6.18-rc4-old/drivers/ide/ide-disk.c
linux-2.6.18-rc4/drivers/ide/ide-disk.c
--- linux-2.6.18-rc4-old/drivers/ide/ide-disk.c 2006-08-19
03:49:03.000000000 -0400
+++ linux-2.6.18-rc4/drivers/ide/ide-disk.c 2006-08-20
19:13:56.000000000 -0400
@@ -464,16 +464,6 @@
}
/*
- * Bits 10 of command_set_1 and cfs_enable_1 must be equal,
- * so on non-buggy drives we need test only one.
- * However, we should also check whether these fields are valid.
- */
-static inline int idedisk_supports_hpa(const struct hd_driveid *id)
-{
- return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400);
-}
-
-/*
* The same here.
*/
static inline int idedisk_supports_lba48(const struct hd_driveid *id)
@@ -528,7 +518,7 @@
* in above order (i.e., if value of higher priority is available,
* reset will be ignored).
*/
-static void init_idedisk_capacity (ide_drive_t *drive)
+void init_idedisk_capacity (ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
/*
@@ -555,6 +545,8 @@
}
}
+EXPORT_SYMBOL(init_idedisk_capacity);
+
static sector_t idedisk_capacity (ide_drive_t *drive)
{
return drive->capacity64 - drive->sect0;
diff -Naur linux-2.6.18-rc4-old/drivers/ide/ide.c
linux-2.6.18-rc4/drivers/ide/ide.c
--- linux-2.6.18-rc4-old/drivers/ide/ide.c 2006-08-19
03:49:03.000000000 -0400
+++ linux-2.6.18-rc4/drivers/ide/ide.c 2006-08-20 19:12:38.000000000
-0400
@@ -1232,6 +1232,7 @@
struct request rq;
struct request_pm_state rqpm;
ide_task_t args;
+ int ide_cmd;
memset(&rq, 0, sizeof(rq));
memset(&rqpm, 0, sizeof(rqpm));
@@ -1242,7 +1243,15 @@
rqpm.pm_step = ide_pm_state_start_resume;
rqpm.pm_state = PM_EVENT_ON;
- return ide_do_drive_cmd(drive, &rq, ide_head_wait);
+ ide_cmd = ide_do_drive_cmd(drive, &rq, ide_head_wait);
+
+ /* check to see if this is a hard drive
+ * if it is then checkhpa needs to be
+ * disabled */
+ if(drive->media == ide_disk && idedisk_supports_hpa(drive->id))
+ init_idedisk_capacity(drive);
+
+ return ide_cmd;
}
int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct
block_device *bdev,
-
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