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path: root/drivers/scsi/sd.c
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-rw-r--r--drivers/scsi/sd.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index b781a90d6699..5a8f55fea5ff 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -35,7 +35,6 @@
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/kernel.h>
-#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/bio.h>
#include <linux/genhd.h>
@@ -1270,9 +1269,18 @@ repeat:
/* Some devices return the total number of sectors, not the
* highest sector number. Make the necessary adjustment. */
- if (sdp->fix_capacity)
+ if (sdp->fix_capacity) {
--sdkp->capacity;
+ /* Some devices have version which report the correct sizes
+ * and others which do not. We guess size according to a heuristic
+ * and err on the side of lowering the capacity. */
+ } else {
+ if (sdp->guess_capacity)
+ if (sdkp->capacity & 0x01) /* odd sizes are odd */
+ --sdkp->capacity;
+ }
+
got_data:
if (sector_size == 0) {
sector_size = 512;