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From: "Nuno Sá" <nuno.sa@analog.com>
To: <linux-iio@vger.kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
	Hartmut Knaack <knaack.h@gmx.de>,
	Jonathan Cameron <jic23@kernel.org>,
	Michael Hennerich <Michael.Hennerich@analog.com>,
	Alexandru Ardelean <alexandru.ardelean@analog.com>
Subject: [PATCH 1/2] iio: adc: adi-axi-adc: Fix object reference counting
Date: Wed, 1 Jul 2020 14:04:41 +0200	[thread overview]
Message-ID: <20200701120442.258-1-nuno.sa@analog.com> (raw)

When looking for a registered client to attach with, the wrong reference
counters are being grabbed. The idea is to increment the module and device
counters of the client device and not the counters of the axi device being
probed.

Fixes: ef04070692a2 (iio: adc: adi-axi-adc: add support for AXI ADC IP core)

Signed-off-by: Nuno Sá <nuno.sa@analog.com>
---
 drivers/iio/adc/adi-axi-adc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index 63d926e86798..86b6b65916ee 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -332,12 +332,12 @@ static struct adi_axi_adc_client *adi_axi_adc_attach_client(struct device *dev)
 		if (cl->dev->of_node != cln)
 			continue;
 
-		if (!try_module_get(dev->driver->owner)) {
+		if (!try_module_get(cl->dev->driver->owner)) {
 			mutex_unlock(&registered_clients_lock);
 			return ERR_PTR(-ENODEV);
 		}
 
-		get_device(dev);
+		get_device(cl->dev);
 		cl->info = info;
 		mutex_unlock(&registered_clients_lock);
 		return cl;
-- 
2.25.1


             reply	other threads:[~2020-07-01 12:05 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01 12:04 Nuno Sá [this message]
2020-07-01 12:04 ` [PATCH 2/2] iio: adc: adi-axi-adc: Remove unneeded check Nuno Sá
2020-07-01 13:57   ` Ardelean, Alexandru
2020-07-01 14:07 ` [PATCH 1/2] iio: adc: adi-axi-adc: Fix object reference counting Ardelean, Alexandru
2020-07-04 16:06   ` Jonathan Cameron

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