This is a note to let you know that I've just added the patch titled
w1: fix w1_send_slave dropping a slave id
to the 3.4-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:
w1-fix-w1_send_slave-dropping-a-slave-id.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6b355b33a64fd6d8ead2b838ec16fb9b551f71e8 Mon Sep 17 00:00:00 2001
From: David Fries <David@xxxxxxxxx>
Date: Wed, 15 Jan 2014 22:29:12 -0600
Subject: w1: fix w1_send_slave dropping a slave id
From: David Fries <David@xxxxxxxxx>
commit 6b355b33a64fd6d8ead2b838ec16fb9b551f71e8 upstream.
Previous logic,
if (avail > 8) {
store slave;
return;
}
send data; clear;
The logic error is, if there isn't space send the buffer and clear,
but the slave wasn't added to the now empty buffer loosing that slave
id. It also should have been "if (avail >= 8)" because when it is 8,
there is space.
Instead, if there isn't space send and clear the buffer, then there is
always space for the slave id.
Signed-off-by: David Fries <David@xxxxxxxxx>
Acked-by: Evgeniy Polyakov <zbr@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/w1/w1_netlink.c | 27 ++++++++++++++-------------
1 file changed, 14 insertions(+), 13 deletions(-)
--- a/drivers/w1/w1_netlink.c
+++ b/drivers/w1/w1_netlink.c
@@ -54,28 +54,29 @@ static void w1_send_slave(struct w1_mast
struct w1_netlink_msg *hdr = (struct w1_netlink_msg *)(msg + 1);
struct w1_netlink_cmd *cmd = (struct w1_netlink_cmd *)(hdr + 1);
int avail;
+ u64 *data;
/* update kernel slave list */
w1_slave_found(dev, rn);
avail = dev->priv_size - cmd->len;
- if (avail > 8) {
- u64 *data = (void *)(cmd + 1) + cmd->len;
-
- *data = rn;
- cmd->len += 8;
- hdr->len += 8;
- msg->len += 8;
- return;
+ if (avail < 8) {
+ msg->ack++;
+ cn_netlink_send(msg, 0, GFP_KERNEL);
+
+ msg->len = sizeof(struct w1_netlink_msg) +
+ sizeof(struct w1_netlink_cmd);
+ hdr->len = sizeof(struct w1_netlink_cmd);
+ cmd->len = 0;
}
- msg->ack++;
- cn_netlink_send(msg, 0, GFP_KERNEL);
+ data = (void *)(cmd + 1) + cmd->len;
- msg->len = sizeof(struct w1_netlink_msg) + sizeof(struct w1_netlink_cmd);
- hdr->len = sizeof(struct w1_netlink_cmd);
- cmd->len = 0;
+ *data = rn;
+ cmd->len += 8;
+ hdr->len += 8;
+ msg->len += 8;
}
static int w1_process_search_command(struct w1_master *dev, struct cn_msg *msg,
Patches currently in stable-queue which might be from David@xxxxxxxxx are
queue-3.4/w1-fix-w1_send_slave-dropping-a-slave-id.patch
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