Fork of alistair23 Linux kernel for reMarkable from https://github.com/alistair23/linux
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download_firmware() is never called from atomic context. It is only called by ll_setup() that is called only via function pointer "->setup" used in hci_uart_setup() in drivers/bluetooth/hci_serdev.c and drivers/bluetooth/hci_ldisc.c. hci_uart_setup() is called only via function pointer "->setup" used in hci_dev_do_open() in net/bluetooth/hci_core.c. All of the above functions do not enter atomic context. Besides, ll_setup() calls msleep() and hci_dev_do_open calls mutex_lock(). So it indicates that all the above functions call functions that can sleep. Despite never getting called from atomic context, download_firmware() calls mdelay() for busy wait. That is not necessary and can be replaced with msleep to avoid busy wait. This is found by a static analysis tool named DCNS written by myself. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> |
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| Documentation | ||
| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
README
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.