From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
To: "Hans de Goede" <hdegoede@redhat.com>,
"Daniel Vetter" <daniel.vetter@intel.com>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
"Wolfram Sang" <wsa@the-dreams.de>, "Len Brown" <lenb@kernel.org>,
"Andy Shevchenko" <andriy.shevchenko@linux.intel.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"H . Peter Anvin" <hpa@zytor.com>
Cc: Takashi Iwai <tiwai@suse.de>,
"russianneuromancer @ ya . ru" <russianneuromancer@ya.ru>,
intel-gfx <intel-gfx@lists.freedesktop.org>,
dri-devel@lists.freedesktop.org, linux-i2c@vger.kernel.org,
Mika Westerberg <mika.westerberg@linux.intel.com>
Subject: Re: [PATCH v2 09/13] i2c: designware-baytrail: Acquire P-Unit access on bus acquire
Date: Fri, 27 Jan 2017 13:29:30 +0200 [thread overview]
Message-ID: <c2721a62-a428-39bf-3f5c-0d25866f425c@linux.intel.com> (raw)
In-Reply-To: <20170123210958.18410-10-hdegoede@redhat.com>
On 01/23/2017 11:09 PM, Hans de Goede wrote:
> Acquire P-Unit access to stop others from accessing the P-Unit while the
> PMIC i2c bus is in use. This is necessary because accessing the P-Unit
> from the kernel may result in the P-Unit trying to access the PMIC i2c
> bus, which results in a hang when it happens while we own the PMIC i2c
> bus semaphore.
>
> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=155241
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> Tested-by: tagorereddy <tagore.chandan@gmail.com>
> Acked-by: Wolfram Sang <wsa@the-dreams.de>
> ---
> Changes in v2:
> -Spelling: P-Unit, PMIC
> -Adjust for iosf_mbi_punit_lock/_unlock to _acquire/_release rename
> ---
> drivers/i2c/busses/i2c-designware-baytrail.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
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next prev parent reply other threads:[~2017-01-27 11:29 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-23 21:09 [PATCH v2 00/13] coordinate cht i2c-pmic and i915-punit accesses Hans de Goede
2017-01-23 21:09 ` [PATCH v2 01/13] x86/platform/intel/iosf_mbi: Add a mutex for P-Unit access Hans de Goede
2017-01-23 21:09 ` [PATCH v2 02/13] x86/platform/intel/iosf_mbi: Add a PMIC bus access notifier Hans de Goede
2017-01-23 21:09 ` [PATCH v2 03/13] i2c: designware: Rename accessor_flags to flags Hans de Goede
2017-01-23 21:09 ` [PATCH v2 04/13] i2c: designware-baytrail: Pass dw_i2c_dev into helper functions Hans de Goede
2017-01-23 21:09 ` [PATCH v2 05/13] i2c: designware-baytrail: Only check iosf_mbi_available() for shared hosts Hans de Goede
2017-01-23 21:09 ` [PATCH v2 06/13] i2c: designware-baytrail: Disallow the CPU to enter C6 or C7 while holding the punit semaphore Hans de Goede
2017-01-24 9:51 ` Andy Shevchenko
2017-01-24 16:48 ` Hans de Goede
2017-01-23 21:09 ` [PATCH v2 07/13] i2c: designware-baytrail: Fix race when resetting the semaphore Hans de Goede
2017-01-23 21:09 ` [PATCH v2 08/13] i2c: designware-baytrail: Add support for cherrytrail Hans de Goede
2017-01-23 21:09 ` [PATCH v2 09/13] i2c: designware-baytrail: Acquire P-Unit access on bus acquire Hans de Goede
2017-01-27 11:29 ` Jarkko Nikula [this message]
2017-01-23 21:09 ` [PATCH v2 10/13] i2c: designware-baytrail: Call pmic_bus_access_notifier_chain Hans de Goede
2017-01-27 11:35 ` Jarkko Nikula
2017-01-23 21:09 ` [PATCH v2 11/13] drm/i915: Add intel_uncore_suspend / resume functions Hans de Goede
2017-01-27 13:45 ` Ville Syrjälä
2017-01-28 16:05 ` Hans de Goede
2017-01-23 21:09 ` [PATCH v2 12/13] drm/i915: Listen for PMIC bus access notifications Hans de Goede
2017-01-27 13:52 ` Ville Syrjälä
2017-01-28 17:39 ` Hans de Goede
2017-01-23 21:09 ` [PATCH v2 13/13] drm/i915: Acquire P-Unit access when modifying P-Unit settings Hans de Goede
2017-01-27 13:51 ` Ville Syrjälä
2017-01-28 16:25 ` Hans de Goede
2017-01-28 17:18 ` Hans de Goede
2017-01-30 13:10 ` Ville Syrjälä
2017-01-30 15:02 ` Hans de Goede
2017-01-30 15:11 ` Ville Syrjälä
2017-01-30 15:27 ` Hans de Goede
2017-01-30 15:38 ` Ville Syrjälä
2017-01-30 16:33 ` Hans de Goede
2017-02-10 10:19 ` Hans de Goede
2017-01-25 20:18 ` [PATCH v2 00/13] coordinate cht i2c-pmic and i915-punit accesses Wolfram Sang
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