Junhao He c0a232f1e1 coresight: trbe: Fix TRBE potential sleep in atomic context ... smp_call_function_single() will allocate an IPI interrupt vector to the target processor and send a function call request to the interrupt vector. After the target processor receives the IPI interrupt, it will execute arm_trbe_remove_coresight_cpu() call request in the interrupt handler. According to the device_unregister() stack information, if other process is useing the device, the down_write() may sleep, and trigger deadlocks or unexpected errors. arm_trbe_remove_coresight_cpu coresight_unregister device_unregister device_del kobject_del __kobject_del sysfs_remove_dir kernfs_remove down_write ---------> it may sleep Add a helper arm_trbe_disable_cpu() to disable TRBE precpu irq and reset per TRBE. Simply call arm_trbe_remove_coresight_cpu() directly without useing the smp_call_function_single(), which is the same as registering the TRBE coresight device. Fixes: 3fbf7f011f ("coresight: sink: Add TRBE driver") Signed-off-by: Junhao He <hejunhao3@huawei.com> Link: https://lore.kernel.org/r/20230814093813.19152-2-hejunhao3@huawei.com [ Remove duplicate cpumask checks during removal ] Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> [ v3 - Remove the operation of assigning NULL to cpudata->drvdata ] Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/20230818084052.10116-1-hejunhao3@huawei.com		2023-08-18 16:42:26 +01:00
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coresight	coresight: trbe: Fix TRBE potential sleep in atomic context	2023-08-18 16:42:26 +01:00
intel_th	Driver core changes for 6.3-rc1	2023-02-24 12:58:55 -08:00
ptt	hwtracing: hisi_ptt: Use pci_dev_id() to simplify the code	2023-08-15 00:45:56 +01:00
stm	- Daniel Verkamp has contributed a memfd series ("mm/memfd: add	2023-02-23 17:09:35 -08:00
Kconfig	hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device	2022-09-08 16:26:17 -06:00