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7359393f3c
card->wait_q is shared by different users, for different wake-up conditions. qeth_irq() can potentially trigger multiple of these conditions: 1) A change to channel->irq_pending, which qeth_send_control_data() is waiting for. 2) A change to card->state, which qeth_clear_channel() and qeth_halt_channel() are waiting for. As qeth_irq() does only a single wake_up(), we might miss to wake up a second eligible waiter. Luckily all waiters are guarded with a timeout, so this situation should recover on its own eventually. To make things work robustly, add an additional wake_up() for changes to channel->state. And extract a helper that updates channel->irq_pending along with the needed wake_up(). Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.