This is a note to let you know that I've just added the patch titled
NTB: Add Error Handling in ntb_device_setup
to the 3.11-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:
ntb-add-error-handling-in-ntb_device_setup.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3b12a0d15bd1559e72ad21d9d807fd2a6706f0ab Mon Sep 17 00:00:00 2001
From: Jon Mason <jon.mason@xxxxxxxxx>
Date: Mon, 15 Jul 2013 13:23:47 -0700
Subject: NTB: Add Error Handling in ntb_device_setup
From: Jon Mason <jon.mason@xxxxxxxxx>
commit 3b12a0d15bd1559e72ad21d9d807fd2a6706f0ab upstream.
If an error is encountered in ntb_device_setup, it is possible that the
spci_cmd isn't populated. Writes to the offset can result in a NULL
pointer dereference. This issue is easily encountered by running in
NTB-RP mode, as it currently is not supported and will generate an
error. To get around this issue, return if an error is encountered
prior to attempting to write to the spci_cmd offset.
Signed-off-by: Jon Mason <jon.mason@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/ntb/ntb_hw.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/ntb/ntb_hw.c
+++ b/drivers/ntb/ntb_hw.c
@@ -644,10 +644,13 @@ static int ntb_device_setup(struct ntb_d
rc = -ENODEV;
}
+ if (rc)
+ return rc;
+
/* Enable Bus Master and Memory Space on the secondary side */
writew(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER, ndev->reg_ofs.spci_cmd);
- return rc;
+ return 0;
}
static void ntb_device_free(struct ntb_device *ndev)
Patches currently in stable-queue which might be from jon.mason@xxxxxxxxx are
queue-3.11/ntb-correct-number-of-scratch-pad-registers.patch
queue-3.11/ntb-add-error-handling-in-ntb_device_setup.patch
queue-3.11/ntb-correct-usd-dsd-identification.patch
queue-3.11/ntb-correct-debugfs-to-work-with-more-than-1-ntb-device.patch
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