diff options
| author | Donggeun Yoo <donggeunyoo.kernel@gmail.com> | 2026-09-02 00:21:26 +0900 |
|---|---|---|
| committer | Jonathan Cameron <jonathan.cameron@oss.qualcomm.com> | 2026-09-07 02:24:53 +0100 |
| commit | e24328974a88aa8541e94e8bb8dfa2ade1b3c45d (patch) | |
| tree | 43a2533acc955d11f5cb8be1ecba0ab8ba4cbb1e /include/net/failover.h | |
| download | linux-stable-e24328974a88aa8541e94e8bb8dfa2ade1b3c45d.tar.gz linux-stable-e24328974a88aa8541e94e8bb8dfa2ade1b3c45d.zip | |
iio: proximity: vl53l0x-i2c: claim direct mode for raw readsgrafted
vl53l0x_read_raw() starts a single-shot ranging measurement and reads
back the result. Once the triggered buffer is enabled the sensor runs in
continuous mode and its data-ready interrupt is routed to the trigger,
so a concurrent in_distance_raw read disturbs the streaming setup and
never gets its completion, returning -ETIMEDOUT.
The original submission claimed direct mode here, but it was dropped
during review because the driver had no buffer support at the time [1].
Continuous (buffered) mode was later added without restoring the
claim [2], reintroducing the conflict.
Reject direct reads while buffered capture is active by claiming direct
mode around the measurement, as the vl53l1x sibling already does.
Fixes: 762186c6e7b1 ("iio: proximity: vl53l0x-i2c: Added continuous mode support")
Link: https://lore.kernel.org/linux-iio/20180911160300.GA9212@himanshu-Vostro-3559/ [1]
Link: https://lore.kernel.org/linux-iio/20240909101508.263085-3-abhashkumarjha123@gmail.com/ [2]
Signed-off-by: Donggeun Yoo <donggeunyoo.kernel@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Diffstat (limited to 'include/net/failover.h')
| -rw-r--r-- | include/net/failover.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/include/net/failover.h b/include/net/failover.h new file mode 100644 index 000000000..f2b42b4b9 --- /dev/null +++ b/include/net/failover.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2018, Intel Corporation. */ + +#ifndef _FAILOVER_H +#define _FAILOVER_H + +#include <linux/netdevice.h> + +struct failover_ops { + int (*slave_pre_register)(struct net_device *slave_dev, + struct net_device *failover_dev); + int (*slave_register)(struct net_device *slave_dev, + struct net_device *failover_dev); + int (*slave_pre_unregister)(struct net_device *slave_dev, + struct net_device *failover_dev); + int (*slave_unregister)(struct net_device *slave_dev, + struct net_device *failover_dev); + int (*slave_link_change)(struct net_device *slave_dev, + struct net_device *failover_dev); + int (*slave_name_change)(struct net_device *slave_dev, + struct net_device *failover_dev); + rx_handler_result_t (*slave_handle_frame)(struct sk_buff **pskb); +}; + +struct failover { + struct list_head list; + struct net_device __rcu *failover_dev; + netdevice_tracker dev_tracker; + struct failover_ops __rcu *ops; +}; + +struct failover *failover_register(struct net_device *dev, + struct failover_ops *ops); +void failover_unregister(struct failover *failover); +int failover_slave_unregister(struct net_device *slave_dev); + +#endif /* _FAILOVER_H */ |