diff options
| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2017-01-30 15:52:14 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-15 09:57:12 +0800 |
| commit | 792bd1fb5b0338232e47412bce2a9b6f0f1fbdaf (patch) | |
| tree | 2ac2b0ffae5d4e3eb74ba8ee0afe91ef1c00549b | |
| parent | ec50c80c780152d2058c23d9e246fc81f73742da (diff) | |
s390/dcssblk: fix device size calculation in dcssblk_direct_access()
commit a63f53e34db8b49675448d03ae324f6c5bc04fe6 upstream.
Since commit dd22f551 "block: Change direct_access calling convention",
the device size calculation in dcssblk_direct_access() is off-by-one.
This results in bdev_direct_access() always returning -ENXIO because the
returned value is not page aligned.
Fix this by adding 1 to the dev_sz calculation.
Fixes: dd22f551 ("block: Change direct_access calling convention")
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/s390/block/dcssblk.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 94a8f4ab57bc..ae1dc37e4068 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -892,7 +892,7 @@ dcssblk_direct_access (struct block_device *bdev, sector_t secnum, dev_info = bdev->bd_disk->private_data; if (!dev_info) return -ENODEV; - dev_sz = dev_info->end - dev_info->start; + dev_sz = dev_info->end - dev_info->start + 1; offset = secnum * 512; addr = (void *) (dev_info->start + offset); *pfn = virt_to_phys(addr) >> PAGE_SHIFT; |