From: "Uwe Kleine-König" <uwe@kleine-koenig.org> To: Dan Williams <dan.j.williams@intel.com>, Vishal Verma <vishal.l.verma@intel.com>, Dave Jiang <dave.jiang@intel.com> Cc: linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org> Subject: [PATCH 2/3] dax-device: Fix error path in dax_driver_register Date: Thu, 28 Jan 2021 00:01:23 +0100 [thread overview] Message-ID: <20210127230124.109522-2-uwe@kleine-koenig.org> (raw) In-Reply-To: <20210127230124.109522-1-uwe@kleine-koenig.org> The static variable match_always_count is supposed to track if there is a driver registered that has .match_always set. If driver_register() fails, the previous increment must be undone. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> --- drivers/dax/bus.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c index 618d462975ba..498c60333d60 100644 --- a/drivers/dax/bus.c +++ b/drivers/dax/bus.c @@ -1417,7 +1417,15 @@ int __dax_driver_register(struct dax_device_driver *dax_drv, mutex_unlock(&dax_bus_lock); if (rc) return rc; - return driver_register(drv); + + rc = driver_register(drv); + if (rc && dax_drv->match_always) { + mutex_lock(&dax_bus_lock); + match_always_count -= dax_drv->match_always; + mutex_unlock(&dax_bus_lock); + } + + return rc; } EXPORT_SYMBOL_GPL(__dax_driver_register); -- 2.29.2 _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org
WARNING: multiple messages have this Message-ID (diff)
From: "Uwe Kleine-König" <uwe@kleine-koenig.org> To: Dan Williams <dan.j.williams@intel.com>, Vishal Verma <vishal.l.verma@intel.com>, Dave Jiang <dave.jiang@intel.com> Cc: linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org> Subject: [PATCH 2/3] dax-device: Fix error path in dax_driver_register Date: Thu, 28 Jan 2021 00:01:23 +0100 [thread overview] Message-ID: <20210127230124.109522-2-uwe@kleine-koenig.org> (raw) In-Reply-To: <20210127230124.109522-1-uwe@kleine-koenig.org> The static variable match_always_count is supposed to track if there is a driver registered that has .match_always set. If driver_register() fails, the previous increment must be undone. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> --- drivers/dax/bus.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c index 618d462975ba..498c60333d60 100644 --- a/drivers/dax/bus.c +++ b/drivers/dax/bus.c @@ -1417,7 +1417,15 @@ int __dax_driver_register(struct dax_device_driver *dax_drv, mutex_unlock(&dax_bus_lock); if (rc) return rc; - return driver_register(drv); + + rc = driver_register(drv); + if (rc && dax_drv->match_always) { + mutex_lock(&dax_bus_lock); + match_always_count -= dax_drv->match_always; + mutex_unlock(&dax_bus_lock); + } + + return rc; } EXPORT_SYMBOL_GPL(__dax_driver_register); -- 2.29.2
next prev parent reply other threads:[~2021-01-27 23:01 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-27 23:01 [PATCH 1/3] device-dax: Prevent registering drivers without probe or remove callback Uwe Kleine-König 2021-01-27 23:01 ` Uwe Kleine-König 2021-01-27 23:01 ` Uwe Kleine-König [this message] 2021-01-27 23:01 ` [PATCH 2/3] dax-device: Fix error path in dax_driver_register Uwe Kleine-König 2021-01-27 23:01 ` [PATCH 3/3] dax-device: Make remove callback return void Uwe Kleine-König 2021-01-27 23:01 ` Uwe Kleine-König
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