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Message-ID: <20240923161942.GK3426578@kernel.org>
Date: Mon, 23 Sep 2024 17:19:42 +0100
From: Simon Horman <horms@...nel.org>
To: Dipendra Khadka <kdipendra88@...il.com>
Cc: andrew@...n.ch, florian.fainelli@...adcom.com, davem@...emloft.net,
edumazet@...gle.com, bcm-kernel-feedback-list@...adcom.com,
kuba@...nel.org, pabeni@...hat.com, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net] net: Add error pointer check in bcmsysport.c
On Mon, Sep 23, 2024 at 05:38:58AM +0000, Dipendra Khadka wrote:
> Add error pointer checks in bcm_sysport_map_queues() and
> bcm_sysport_unmap_queues() before deferencing 'dp'.
nit: dereferencing
Flagged by checkpatch.pl --codespell
>
> Signed-off-by: Dipendra Khadka <kdipendra88@...il.com>
This patch does not compile.
Please take care to make sure your paches compile.
And, moroever, please slow down a bit. Please take some time to learn the
process by getting one patch accepted. Rather going through that process
with several patches simultaneously.
> ---
> v2:
> - Change the subject of the patch to net
I'm sorry to say that the subject is still not correct.
Looking over the git history for this file, I would go for
a prefix of 'net: systemport: '. I would also pass on mentioning
the filename in the subject. Maybe:
Subject: [PATCH v3 net] net: systemport: correct error pointer handling
Also, I think that it would be better, although more verbose,
to update these functions so that the assignment of dp occurs
just before it is checked.
In the case of bcm_sysport_map_queues(), that would look something like this
(completely untested!):
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index c9faa8540859..7411f69a8806 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -2331,11 +2331,15 @@ static const struct net_device_ops bcm_sysport_netdev_ops = {
static int bcm_sysport_map_queues(struct net_device *dev,
struct net_device *slave_dev)
{
- struct dsa_port *dp = dsa_port_from_netdev(slave_dev);
struct bcm_sysport_priv *priv = netdev_priv(dev);
struct bcm_sysport_tx_ring *ring;
unsigned int num_tx_queues;
unsigned int q, qp, port;
+ struct dsa_port *dp;
+
+ dp = dsa_port_from_netdev(slave_dev);
+ if (IS_ERR(dp))
+ return PTR_ERR(dp);
/* We can't be setting up queue inspection for non directly attached
* switches
This patch is now targeted at 'net'. Which means that you believe
it is a bug fix. I'd say that is reasonable, though it does seem to
be somewhat theoretical. But in any case, a bug fix should
have a Fixes tag, which describes the commit that added the bug.
Alternatively, if it is not a bug fix, then it should be targeted at
net-next (and not have a Fixes tag). Please note that net-next is currently
closed for the v6.12 merge window. It shold re-open after v6.12-rc1 has
been released, which I expect to occur about a week for now. You should
wait for net-next to re-open before posting non-RFC patches for it.
Lastly, when reposting patches, please note the 24h rule.
https://docs.kernel.org/process/maintainer-netdev.html
--
pw-bot: changes-requested
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