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Main-line Linux kernel tree http://www.kernel.org
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Umesh Nerlige Ramappa 4cbed7702e drm/i915/pmu: Check if pmu is closed before stopping event 
When the driver unbinds, pmu is unregistered and i915->uabi_engines is
set to RB_ROOT. Due to this, when i915 PMU tries to stop the engine
events, it issues a warn_on because engine lookup fails.

All perf hooks are taking care of this using a pmu->closed flag that is
set when PMU unregisters. The stop event seems to have been left out.

Check for pmu->closed in pmu_event_stop as well.

Based on discussion here -
https://patchwork.freedesktop.org/patch/492079/?series=105790&rev=2

v2: s/is/if/ in commit title
v3: Add fixes tag and cc stable

Cc: <stable@vger.kernel.org> # v5.11+
Fixes: b00bccb3f0 ("drm/i915/pmu: Handle PCI unbind")
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231020152441.3764850-1-umesh.nerlige.ramappa@intel.com
(cherry picked from commit 31f6a06f0c)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2023-10-25 08:44:30 -04:00
arch powerpc fixes for 6.6 #5 2023-10-21 18:46:47 -07:00
block
certs
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Documentation phy fixes for 6.6 2023-10-22 07:11:10 -10:00
drivers drm/i915/pmu: Check if pmu is closed before stopping event 2023-10-25 08:44:30 -04:00
fs Bug fixes for 6.6-rc6: 2023-10-21 09:43:09 -07:00
include Fix group event semantics. 2023-10-21 11:09:29 -07:00
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kernel Fix a recently introduced use-after-free bug. 2023-10-21 11:19:07 -07:00
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tools Probes fixes for v6.6-rc6.2: 2023-10-21 11:00:36 -07:00
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MAINTAINERS platform-drivers-x86 for v6.6-5 2023-10-21 10:02:46 -07:00
Makefile Linux 6.6-rc7 2023-10-22 12:11:21 -10:00
README

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.