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SubjectSuspend support for IDE
Hi!

This adds driver support to ide-disk.c. Does it look good to you? [If
so, applying it will not hurt, altrough it might change in near
future.]

Pavel

--- clean.pre/drivers/ide/ide-disk.c Fri Mar 8 18:40:34 2002
+++ linux-dm.pre/drivers/ide/ide-disk.c Fri Mar 8 18:40:07 2002
@@ -123,6 +123,8 @@
*/
static ide_startstop_t do_rw_disk (ide_drive_t *drive, struct request *rq, unsigned long block)
{
+ if (drive->blocked)
+ panic("ide: Request while drive blocked? You don't like your data intact?");
if (!(rq->flags & REQ_CMD)) {
blk_dump_rq_flags(rq, "do_rw_disk, bad command");
ide_end_request(drive, 0);
@@ -910,13 +912,36 @@
ide_add_setting(drive, "max_failures", SETTING_RW, -1, -1, TYPE_INT, 0, 65535, 1, 1, &drive->max_failures, NULL);
}

+static int idedisk_suspend(struct device *dev, u32 state, u32 level)
+{
+ int i;
+ ide_drive_t *drive = dev->driver_data;
+
+ printk("ide_disk_suspend()\n");
+ while (HWGROUP(drive)->handler)
+ schedule();
+ drive->blocked = 1;
+}
+
+static int idedisk_resume(struct device *dev, u32 level)
+{
+ ide_drive_t *drive = dev->driver_data;
+ if (!drive->blocked)
+ panic("ide: Resume but not suspended?\n");
+ drive->blocked = 0;
+}
+
+
/* This is just a hook for the overall driver tree.
*
* FIXME: This is soon goig to replace the custom linked list games played up
* to great extend between the different components of the IDE drivers.
*/

-static struct device_driver idedisk_devdrv = {};
+static struct device_driver idedisk_devdrv = {
+ suspend: idedisk_suspend,
+ resume: idedisk_resume,
+};

static void idedisk_setup(ide_drive_t *drive)
{
@@ -963,6 +988,7 @@
sprintf(drive->device.name, "ide-disk");
drive->device.driver = &idedisk_devdrv;
drive->device.parent = &HWIF(drive)->device;
+ drive->device.driver_data = drive;
device_register(&drive->device);
}

--- clean.pre/include/linux/ide.h Fri Mar 8 18:40:38 2002
+++ linux-dm.pre/include/linux/ide.h Fri Mar 8 18:37:44 2002
@@ -410,6 +410,7 @@
unsigned autotune : 2; /* 1=autotune, 2=noautotune, 0=default */
unsigned remap_0_to_1 : 2; /* 0=remap if ezdrive, 1=remap, 2=noremap */
unsigned ata_flash : 1; /* 1=present, 0=default */
+ unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
unsigned addressing; /* : 2; 0=28-bit, 1=48-bit, 2=64-bit */
byte scsi; /* 0=default, 1=skip current ide-subdriver for ide-scsi emulation */
select_t select; /* basic drive/head select reg value */
--
(about SSSCA) "I don't say this lightly. However, I really think that the U.S.
no longer is classifiable as a democracy, but rather as a plutocracy." --hpa
-
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