080b4f976b
Some usage of del_timer() in the driver is potentially unsafe. When running the sas_task->slow_task timer in hisi_sas_exec_internal_tmf_task(), execution may be blocked in function hisi_sas_task_exec(); so it is possible that the timer is running when the callback to disable the timer is running. This could be dangerous, as we immediately release resources which the timer callback uses after disabling the timer. The same situation may be found at other sites, such as _hisi_sas_internal_task_abort(). Change calls to del_timer() to del_timer_sync() as necessary, to ensure any timer has finished when disabling. Also remove calls to timer_pending() prior to del_timer() as it is not necessary. Link: https://lore.kernel.org/r/1629799260-120116-5-git-send-email-john.garry@huawei.com Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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.