Currently when system which have HPA require HPA to be detected and
disabled upon resume from RAM or disk. The current IDE drivers do not do
this nor does libata(obviously it since it doesn't support HPA yet). I
have implemented this into the current IDE drivers and it has been
tested by many others since 7/15/2006 in bug number
6840(http://bugzilla.kernel.org/show_bug.cgi?id=6840) and it has been
confirmed to work fine with no problems.
--- linux-2.6.21.1-old/include/linux/ide.h 2007-05-01 02:54:12.000000000
-0400
+++ linux-2.6.21.1/include/linux/ide.h 2007-04-28 01:06:20.000000000 -0400
@@ -1005,6 +1005,7 @@
int (*probe)(ide_drive_t *);
void (*remove)(ide_drive_t *);
void (*shutdown)(ide_drive_t *);
+ void (*resume)(ide_drive_t *);
} ide_driver_t;
#define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
--- linux-2.6.21.1-old/drivers/ide/ide.c 2007-05-01 02:54:12.000000000
-0400
+++ linux-2.6.21.1/drivers/ide/ide.c 2007-04-28 03:41:24.000000000 -0400
@@ -1260,9 +1260,11 @@
{
ide_drive_t *drive = dev->driver_data;
ide_hwif_t *hwif = HWIF(drive);
+ ide_driver_t *drv = to_ide_driver(dev->driver);
struct request rq;
struct request_pm_state rqpm;
ide_task_t args;
+ int err;
/* Call ACPI _STM only once */
if (!(drive->dn % 2))
@@ -1279,7 +1281,12 @@
rqpm.pm_step = ide_pm_state_start_resume;
rqpm.pm_state = PM_EVENT_ON;
- return ide_do_drive_cmd(drive, &rq, ide_head_wait);
+ err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
+
+ if (err == 0 && drv->resume)
+ drv->resume(drive);
+
+ return err;
}
int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct
block_device *bdev,
--- linux-2.6.21.1-old/drivers/ide/ide-disk.c 2007-05-01 02:54:12.000000000
-0400
+++ linux-2.6.21.1/drivers/ide/ide-disk.c 2007-04-28 01:06:20.000000000
-0400
@@ -1024,6 +1024,17 @@
static int ide_disk_probe(ide_drive_t *drive);
+/*
+ * On HPA drives the capacity needs to be
+ * reinitilized on resume otherwise the disk
+ * can not be used and a hard reset is required
+ */
+static void ide_disk_resume(ide_drive_t *drive)
+{
+ if (idedisk_supports_hpa(drive->id))
+ init_idedisk_capacity(drive);
+}
+
static void ide_device_shutdown(ide_drive_t *drive)
{
#ifdef CONFIG_ALPHA
@@ -1067,6 +1078,7 @@
.error = __ide_error,
.abort = __ide_abort,
.proc = idedisk_proc,
+ .resume = ide_disk_resume,
};
static int idedisk_open(struct inode *inode, struct file *filp)
-
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