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a19c261901
kaweth_async_set_rx_mode() invokes kaweth_contol() and has two callers: - kaweth_open() which is invoked from preemptible context . - kaweth_start_xmit() which holds a spinlock and has bottom halfs disabled. If called from kaweth_start_xmit() kaweth_async_set_rx_mode() obviously cannot block, which means it can't call kaweth_control(). This is detected with an in_interrupt() check. Replace the in_interrupt() check in kaweth_async_set_rx_mode() with an argument which is set true by the caller if the context is safe to sleep, otherwise false. Now kaweth_control() is only called from preemptible context which means there is no need for GFP_ATOMIC allocations anymore. Replace it with usb_control_msg(). Cleanup the code a bit while at it. Finally remove kaweth_control() since the last user is gone. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| certs | ||
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.