Hi Dan,
On Wed, Feb 03, 2021 at 12:42:50PM +0300, Dan Carpenter wrote:
Hello Coiby Xu,
The patch 953b94009377: "staging: qlge: Initialize devlink health
dump framework" from Jan 23, 2021, leads to the following static
checker warning:
drivers/staging/qlge/qlge_devlink.c:163 qlge_health_create_reporters()
error: uninitialized symbol 'reporter'.
drivers/staging/qlge/qlge_devlink.c
151 void qlge_health_create_reporters(struct qlge_adapter *priv)
152 {
153 struct devlink_health_reporter *reporter;
154 struct devlink *devlink;
155
156 devlink = priv_to_devlink(priv);
157 priv->reporter =
158 devlink_health_reporter_create(devlink,
&qlge_reporter_ops,
159 0, priv);
160 if (IS_ERR(priv->reporter))
161 netdev_warn(priv->ndev,
162 "Failed to create reporter, err = %ld\n",
163 PTR_ERR(reporter));
Obviously the static checker is correct because we initialized
"priv->reporter" instead of "reporter".
It's not clear to me how "reporter" is used. Presumably this should be:
reporter = devlink_health_reporter_create(devlink, &qlge_reporter_ops,
0, priv);
if (IS_ERR(reporter)) {
netdev_warn(priv->ndev,
"Failed to create reporter, err = %ld\n",
PTR_ERR(reporter));
return;
}
priv->reporter = reporter;
Thank you for finding this issue! "struct devlink_health_reporter
*reporter" is not needed since priv->reporter is used instead which
I think simplifies the code.
But I can't actually find where "priv->reporter" is checked against
NULL. There should be some NULL checks, right?
There is no need to do NULL check since devlink_health_reporter_create
has done the job for us,
// net/core/devlink.c
__devlink_health_reporter_create(struct devlink *devlink,
const struct devlink_health_reporter_ops *ops,
u64 graceful_period, void *priv)
{
reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
if (!reporter)
return ERR_PTR(-ENOMEM);
}
164 }
regards,
dan carpenter
--
Best regards,
Coiby
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