From: <gregkh@linuxfoundation.org>
To: gerald.schaefer@de.ibm.com, gregkh@linuxfoundation.org,
schwidefsky@de.ibm.com
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "s390/dcssblk: fix device size calculation in dcssblk_direct_access()" has been added to the 4.9-stable tree
Date: Sun, 12 Mar 2017 17:32:19 +0100 [thread overview]
Message-ID: <1489336339204140@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
s390/dcssblk: fix device size calculation in dcssblk_direct_access()
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
s390-dcssblk-fix-device-size-calculation-in-dcssblk_direct_access.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From a63f53e34db8b49675448d03ae324f6c5bc04fe6 Mon Sep 17 00:00:00 2001
From: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Date: Mon, 30 Jan 2017 15:52:14 +0100
Subject: s390/dcssblk: fix device size calculation in dcssblk_direct_access()
From: Gerald Schaefer <gerald.schaefer@de.ibm.com>
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>
---
drivers/s390/block/dcssblk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -892,7 +892,7 @@ dcssblk_direct_access (struct block_devi
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;
*kaddr = (void *) dev_info->start + offset;
*pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV);
Patches currently in stable-queue which might be from gerald.schaefer@de.ibm.com are
queue-4.9/s390-dcssblk-fix-device-size-calculation-in-dcssblk_direct_access.patch
reply other threads:[~2017-03-12 17:48 UTC|newest]
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