Flushing system-wide workqueues is dangerous and will be forbidden. Replace system_wq with local atmel_wq. Link: https://lkml.kernel.org/r/49925af7-78a8-a3dd-bce6-cfc02e1a9236@xxxxxxxxxxxxxxxxxxx Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx> --- Note: This patch is only compile tested. drivers/crypto/atmel-ecc.c | 2 +- drivers/crypto/atmel-i2c.c | 24 +++++++++++++++++++++++- drivers/crypto/atmel-i2c.h | 1 + drivers/crypto/atmel-sha204a.c | 2 +- 4 files changed, 26 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/atmel-ecc.c b/drivers/crypto/atmel-ecc.c index 333fbefbbccb..59a57279e77b 100644 --- a/drivers/crypto/atmel-ecc.c +++ b/drivers/crypto/atmel-ecc.c @@ -398,7 +398,7 @@ static int __init atmel_ecc_init(void) static void __exit atmel_ecc_exit(void) { - flush_scheduled_work(); + atmel_i2c_flush_queue(); i2c_del_driver(&atmel_ecc_driver); } diff --git a/drivers/crypto/atmel-i2c.c b/drivers/crypto/atmel-i2c.c index 6fd3e969211d..226c55bfb9d6 100644 --- a/drivers/crypto/atmel-i2c.c +++ b/drivers/crypto/atmel-i2c.c @@ -263,6 +263,8 @@ static void atmel_i2c_work_handler(struct work_struct *work) work_data->cbk(work_data, work_data->areq, status); } +static struct workqueue_struct *atmel_wq; + void atmel_i2c_enqueue(struct atmel_i2c_work_data *work_data, void (*cbk)(struct atmel_i2c_work_data *work_data, void *areq, int status), @@ -272,10 +274,16 @@ void atmel_i2c_enqueue(struct atmel_i2c_work_data *work_data, work_data->areq = areq; INIT_WORK(&work_data->work, atmel_i2c_work_handler); - schedule_work(&work_data->work); + queue_work(atmel_wq, &work_data->work); } EXPORT_SYMBOL(atmel_i2c_enqueue); +void atmel_i2c_flush_queue(void) +{ + flush_workqueue(atmel_wq); +} +EXPORT_SYMBOL(atmel_i2c_flush_queue); + static inline size_t atmel_i2c_wake_token_sz(u32 bus_clk_rate) { u32 no_of_bits = DIV_ROUND_UP(TWLO_USEC * bus_clk_rate, USEC_PER_SEC); @@ -372,6 +380,20 @@ int atmel_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) } EXPORT_SYMBOL(atmel_i2c_probe); +static int __init atmel_i2c_init(void) +{ + atmel_wq = alloc_workqueue("atmel_wq", 0, 0); + return atmel_wq ? 0 : -ENOMEM; +} + +static void __exit atmel_i2c_exit(void) +{ + destroy_workqueue(atmel_wq); +} + +module_init(atmel_i2c_init); +module_exit(atmel_i2c_exit); + MODULE_AUTHOR("Tudor Ambarus <tudor.ambarus@xxxxxxxxxxxxx>"); MODULE_DESCRIPTION("Microchip / Atmel ECC (I2C) driver"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/crypto/atmel-i2c.h b/drivers/crypto/atmel-i2c.h index 63b97b104f16..48929efe2a5b 100644 --- a/drivers/crypto/atmel-i2c.h +++ b/drivers/crypto/atmel-i2c.h @@ -173,6 +173,7 @@ void atmel_i2c_enqueue(struct atmel_i2c_work_data *work_data, void (*cbk)(struct atmel_i2c_work_data *work_data, void *areq, int status), void *areq); +void atmel_i2c_flush_queue(void); int atmel_i2c_send_receive(struct i2c_client *client, struct atmel_i2c_cmd *cmd); diff --git a/drivers/crypto/atmel-sha204a.c b/drivers/crypto/atmel-sha204a.c index c96c14e7dab1..2168f877bd43 100644 --- a/drivers/crypto/atmel-sha204a.c +++ b/drivers/crypto/atmel-sha204a.c @@ -159,7 +159,7 @@ static int __init atmel_sha204a_init(void) static void __exit atmel_sha204a_exit(void) { - flush_scheduled_work(); + atmel_i2c_flush_queue(); i2c_del_driver(&atmel_sha204a_driver); } -- 2.32.0
