ide: Stop disks on reboot for laptop which cuts power

My laptop (Acer Travelmate 660) always cuts the power when rebooting
which causes the disk to emergency-park it's head.

Add a dmi check to stop disk as for shutdown on this laptop.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 16 insertions, 1 deletions

diff --git a/drivers/ide/ide-gd.c b/drivers/ide/ide-gd.c
index 1aebdf1a4f58..4b6b71e2cdf5 100644
--- a/drivers/ide/ide-gd.c
+++ b/drivers/ide/ide-gd.c
@@ -7,6 +7,7 @@
 #include <linux/mutex.h>
 #include <linux/ide.h>
 #include <linux/hdreg.h>
+#include <linux/dmi.h>
 
 #if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
 #define IDE_DISK_MINORS         (1 << PARTN_BITS)
@@ -99,6 +100,19 @@ static void ide_gd_resume(ide_drive_t *drive)
                 (void)drive->disk_ops->get_capacity(drive);
 }
 
+static const struct dmi_system_id ide_coldreboot_table[] = {
+        {
+                /* Acer TravelMate 66x cuts power during reboot */
+                .ident   = "Acer TravelMate 660",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 660"),
+                },
+        },
+
+        { }     /* terminate list */
+};
+
 static void ide_gd_shutdown(ide_drive_t *drive)
 {
 #ifdef  CONFIG_ALPHA
@@ -115,7 +129,8 @@ static void ide_gd_shutdown(ide_drive_t *drive)
            the disk to expire its write cache. */
         if (system_state != SYSTEM_POWER_OFF) {
 #else
-        if (system_state == SYSTEM_RESTART) {
+        if (system_state == SYSTEM_RESTART &&
+                !dmi_check_system(ide_coldreboot_table)) {
 #endif
                 drive->disk_ops->flush(drive);
                 return;