From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org
Cc: Jiri Slaby <jirislaby@kernel.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: [PATCH v1 0/2] serial: 8250_port: Update runtime PM flow
Date: Fri, 14 Aug 2026 13:16:28 +0200 [thread overview]
Message-ID: <20260814112435.3290545-1-andriy.shevchenko@linux.intel.com> (raw)
There are two changes, one is a straightforward drop of the duplicate
runtime PM call (which is idempotent and hence it's harmless to call,
but practically no need to do so) and the other addresses long standing
problem with potentially sleeping PM calls on some system in IRQ context.
Also the latter might lead to unneeded resume-suspend cycle when IRQ is
shared and interrupt is not ours. This mini-series to update runtime
PM flow to make sure this won't happen.
Andy Shevchenko (2):
serial: 8250_port: Remove redundant pm_runtime_mark_last_busy() call
serial: 8250_port: properly handle runtime PM in IRQ
drivers/tty/serial/8250/8250_port.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
--
2.50.1
next reply other threads:[~2026-08-14 11:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-14 11:16 Andy Shevchenko [this message]
2026-08-14 11:16 ` [PATCH v1 1/2] serial: 8250_port: Remove redundant pm_runtime_mark_last_busy() call Andy Shevchenko
2026-08-14 11:16 ` [PATCH v1 2/2] serial: 8250_port: properly handle runtime PM in IRQ Andy Shevchenko
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