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authorTejun Heo <tj@kernel.org>2008-08-25 19:47:24 +0900
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:06 +0200
commitf615b48cc7df7cac3865ec76ac1a5bb04d3e07f4 (patch)
treea61ba32641118296ecc942814e03b4b0ababfa63 /drivers/scsi/sd.c
parent1f0142905d4812966831613847db38a66da29eb8 (diff)
sd/ide-disk: apply extended minors to sd and ide
Update sd and ide-disk such that they can take advantage of extended minors. ide-disk already has 64 minors per device and currently doesn't use extended minors although after this patch it can be turned on by simply tweaking constants. sd only had 16 minors per device causing problems on certain peculiar configurations. This patch lifts the restriction and enables it to use upto 64 minors. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/scsi/sd.c')
-rw-r--r--drivers/scsi/sd.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index e5e7d7856454..d1bb0e1d2d28 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -86,6 +86,10 @@ MODULE_ALIAS_SCSI_DEVICE(TYPE_DISK);
MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
+#define SD_PARTS 64
+#define SD_MINORS 16
+#define SD_EXT_MINORS (SD_PARTS - SD_MINORS)
+
static int sd_revalidate_disk(struct gendisk *);
static int sd_probe(struct device *);
static int sd_remove(struct device *);
@@ -1801,7 +1805,7 @@ static int sd_probe(struct device *dev)
if (!sdkp)
goto out;
- gd = alloc_disk(16);
+ gd = alloc_disk_ext(SD_MINORS, SD_EXT_MINORS);
if (!gd)
goto out_free;
@@ -1845,7 +1849,8 @@ static int sd_probe(struct device *dev)
gd->major = sd_major((index & 0xf0) >> 4);
gd->first_minor = ((index & 0xf) << 4) | (index & 0xfff00);
- gd->minors = 16;
+ gd->minors = SD_MINORS;
+ gd->ext_minors = SD_EXT_MINORS;
gd->fops = &sd_fops;
if (index < 26) {