From: Marc Kleine-Budde <mkl@pengutronix.de>
To: linux-can@vger.kernel.org
Cc: kernel@pengutronix.de,
Navid Emamdoost <navid.emamdoost@gmail.com>,
Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [net-rfc 11/16] can: xilinx_can: handle failure cases of pm_runtime_get_sync
Date: Mon, 19 Oct 2020 21:05:19 +0200 [thread overview]
Message-ID: <20201019190524.1285319-12-mkl@pengutronix.de> (raw)
In-Reply-To: <20201019190524.1285319-1-mkl@pengutronix.de>
From: Navid Emamdoost <navid.emamdoost@gmail.com>
Calling pm_runtime_get_sync increments the counter even in case of
failure, causing incorrect ref count. Call pm_runtime_put if
pm_runtime_get_sync fails.
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Link: https://lore.kernel.org/r/20200605033239.60664-1-navid.emamdoost@gmail.com
Fixes: 4716620d1b62 ("can: xilinx: Convert to runtime_pm")
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/xilinx_can.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/can/xilinx_can.c b/drivers/net/can/xilinx_can.c
index 6c4d00d2dbdc..48d746e18f30 100644
--- a/drivers/net/can/xilinx_can.c
+++ b/drivers/net/can/xilinx_can.c
@@ -1395,7 +1395,7 @@ static int xcan_open(struct net_device *ndev)
if (ret < 0) {
netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
__func__, ret);
- return ret;
+ goto err;
}
ret = request_irq(ndev->irq, xcan_interrupt, priv->irq_flags,
@@ -1479,6 +1479,7 @@ static int xcan_get_berr_counter(const struct net_device *ndev,
if (ret < 0) {
netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
__func__, ret);
+ pm_runtime_put(priv->dev);
return ret;
}
@@ -1793,7 +1794,7 @@ static int xcan_probe(struct platform_device *pdev)
if (ret < 0) {
netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
__func__, ret);
- goto err_pmdisable;
+ goto err_disableclks;
}
if (priv->read_reg(priv, XCAN_SR_OFFSET) != XCAN_SR_CONFIG_MASK) {
@@ -1828,7 +1829,6 @@ static int xcan_probe(struct platform_device *pdev)
err_disableclks:
pm_runtime_put(priv->dev);
-err_pmdisable:
pm_runtime_disable(&pdev->dev);
err_free:
free_candev(ndev);
--
2.28.0
next prev parent reply other threads:[~2020-10-19 19:05 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-19 19:05 [RFC]: can 2020-10-19 Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 01/16] can: proc: can_remove_proc(): silence remove_proc_entry warning Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 02/16] can: rx-offload: don't call kfree_skb() from IRQ context Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 03/16] can: dev: can_get_echo_skb(): prevent call to kfree_skb() in hard " Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 04/16] can: dev: can_get_len(): add a helper function to get the correct length of Classical frames Marc Kleine-Budde
2020-10-19 20:35 ` Oliver Hartkopp
2020-10-20 6:35 ` Marc Kleine-Budde
2020-10-20 11:30 ` Vincent Mailhol
2020-10-20 11:48 ` Marc Kleine-Budde
2020-10-20 12:38 ` Oliver Hartkopp
2020-10-20 15:02 ` Marc Kleine-Budde
2020-10-20 16:07 ` Vincent Mailhol
2020-10-20 17:04 ` Oliver Hartkopp
2020-10-20 18:50 ` Marc Kleine-Budde
2020-10-21 0:52 ` Vincent Mailhol
2020-10-21 6:23 ` Vincent MAILHOL
2020-10-21 7:11 ` Joakim Zhang
2020-10-21 7:21 ` Marc Kleine-Budde
2020-10-21 7:48 ` Joakim Zhang
2020-10-21 9:21 ` Oliver Hartkopp
2020-10-21 9:48 ` Oliver Hartkopp
2020-10-21 11:55 ` Vincent MAILHOL
2020-10-21 17:52 ` Oliver Hartkopp
2020-10-22 3:30 ` Vincent MAILHOL
2020-10-22 7:15 ` Oliver Hartkopp
2020-10-22 12:23 ` Vincent MAILHOL
2020-10-22 13:28 ` Oliver Hartkopp
2020-10-22 15:46 ` Vincent MAILHOL
2020-10-22 17:06 ` Oliver Hartkopp
2020-10-23 10:36 ` Vincent MAILHOL
2020-10-23 16:47 ` Oliver Hartkopp
2020-10-24 5:25 ` Vincent MAILHOL
2020-10-24 11:31 ` Oliver Hartkopp
2020-10-19 19:05 ` [net-rfc 05/16] can: dev: __can_get_echo_skb(): fix the returned length of CAN frame Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 06/16] can: can_create_echo_skb(): fix echo skb generation: always use skb_clone() Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 07/16] can: j1939: j1939_sk_bind(): return failure if netdev is down Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 08/16] can: isotp: Explain PDU in CAN_ISOTP help text Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 09/16] can: isotp: enable RX timeout handling in listen-only mode Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 10/16] can: ti_hecc: add missed clk_disable_unprepare() in error path Marc Kleine-Budde
2020-10-19 19:05 ` Marc Kleine-Budde [this message]
2020-10-19 19:05 ` [net-rfc 12/16] can: peak_usb: fix timestamp wrapping Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 13/16] can: peak_canfd: fix echo management when loopback is on Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 14/16] can: mcp251xfd: mcp251xfd_regmap_crc_read(): increase severity of CRC read error messages Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 15/16] can: mcp251xfd: mcp251xfd_regmap_nocrc_read(): fix semicolon.cocci warnings Marc Kleine-Budde
2020-10-19 19:05 ` [net-rfc 16/16] can: mcp251xfd: remove unneeded break Marc Kleine-Budde
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