ide: fix PowerMac bootup oops
PowerMac bootup with CONFIG_IDE=y oopses in ide_pio_cycle_time():
because "ide: try to use PIO Mode 0 during probe if possible" causes
pmac_ide_set_pio_mode() to be called before drive->id has been set.
Bart points out other places which now need drive->id set earlier,
so follow his advice to allocate it in ide_port_alloc_devices()
(using kzalloc_node, without error message, as when allocating drive)
and memset it for reuse in ide_port_init_devices_data().
Fixed in passing: ide_host_alloc() was missing ide_port_free_devices()
from an error path.
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Joao Ramos <joao.ramos@inov.pt>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index f9c2fb7..f371b0d 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -465,23 +465,8 @@
int rc;
u8 cmd;
- /*
- * In order to keep things simple we have an id
- * block for all drives at all times. If the device
- * is pre ATA or refuses ATA/ATAPI identify we
- * will add faked data to this.
- *
- * Also note that 0 everywhere means "can't do X"
- */
-
drive->dev_flags &= ~IDE_DFLAG_ID_READ;
- drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL);
- if (drive->id == NULL) {
- printk(KERN_ERR "ide: out of memory for id data.\n");
- return 0;
- }
-
m = (char *)&drive->id[ATA_ID_PROD];
strcpy(m, "UNKNOWN");
@@ -497,7 +482,7 @@
}
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
- goto out_free;
+ return 0;
/* identification failed? */
if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
@@ -521,7 +506,7 @@
}
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
- goto out_free;
+ return 0;
/* The drive wasn't being helpful. Add generic info only */
if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
@@ -535,9 +520,6 @@
}
return 1;
-out_free:
- kfree(drive->id);
- return 0;
}
static void hwif_release_dev(struct device *dev)
@@ -825,8 +807,6 @@
if (ide_init_queue(drive)) {
printk(KERN_ERR "ide: failed to init %s\n",
drive->name);
- kfree(drive->id);
- drive->id = NULL;
drive->dev_flags &= ~IDE_DFLAG_PRESENT;
continue;
}
@@ -955,9 +935,6 @@
blk_cleanup_queue(drive->queue);
drive->queue = NULL;
- kfree(drive->id);
- drive->id = NULL;
-
drive->dev_flags &= ~IDE_DFLAG_PRESENT;
complete(&drive->gendev_rel_comp);
@@ -1140,8 +1117,11 @@
ide_port_for_each_dev(i, drive, hwif) {
u8 j = (hwif->index * MAX_DRIVES) + i;
+ u16 *saved_id = drive->id;
memset(drive, 0, sizeof(*drive));
+ memset(saved_id, 0, SECTOR_SIZE);
+ drive->id = saved_id;
drive->media = ide_disk;
drive->select = (i << 4) | ATA_DEVICE_OBS;
@@ -1248,8 +1228,10 @@
ide_drive_t *drive;
int i;
- ide_port_for_each_dev(i, drive, hwif)
+ ide_port_for_each_dev(i, drive, hwif) {
+ kfree(drive->id);
kfree(drive);
+ }
}
static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
@@ -1263,6 +1245,18 @@
if (drive == NULL)
goto out_nomem;
+ /*
+ * In order to keep things simple we have an id
+ * block for all drives at all times. If the device
+ * is pre ATA or refuses ATA/ATAPI identify we
+ * will add faked data to this.
+ *
+ * Also note that 0 everywhere means "can't do X"
+ */
+ drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
+ if (drive->id == NULL)
+ goto out_nomem;
+
hwif->devices[i] = drive;
}
return 0;
@@ -1304,6 +1298,7 @@
if (idx < 0) {
printk(KERN_ERR "%s: no free slot for interface\n",
d ? d->name : "ide");
+ ide_port_free_devices(hwif);
kfree(hwif);
continue;
}