devm_kmalloc() is used to allocate memory for a driver dev. Comments above the definition and doc (https://www.kernel.org/doc/Documentation/driver-model/devres.txt) all imply that allocated the memory is automatically freed on driver attach, no matter allocation fail or not. However, I examined the code, and there are many sites that devm_kfree() is used to free devm_kmalloc(). e.g. hisi_sas_debugfs_init() in drivers/scsi/hisi_sas/hisi_sas_main.c. So I am totally confused about this issue. Can anybody give me some guidance? When should we use devm_kfree()?
Thanks
