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[ Upstream commit 8f35ae17ef565a605de5f409e04bcd49a55d7646 ] It tries to avoid the frequently hb_timer refresh in commitba6f5e33bd("sctp: avoid refreshing heartbeat timer too often"), and it only allows mod_timer when the new expires is after hb_timer.expires. It means even a much shorter interval for hb timer gets applied, it will have to wait until the current hb timer to time out. In sctp_do_8_2_transport_strike(), when a transport enters PF state, it expects to update the hb timer to resend a heartbeat every rto after calling sctp_transport_reset_hb_timer(), which will not work as the change mentioned above. The frequently hb_timer refresh was caused by sctp_transport_reset_timers() called in sctp_outq_flush() and it was already removed in the commit above. So we don't have to check hb_timer.expires when resetting hb_timer as it is now not called very often. Fixes:ba6f5e33bd("sctp: avoid refreshing heartbeat timer too often") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Link: https://lore.kernel.org/r/d958c06985713ec84049a2d5664879802710179a.1675095933.git.lucien.xin@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.