Re: FAILED: patch "[PATCH] EDAC/altera: Use fast register IO for S10 IRQs" failed to apply to 4.19-stable tree

[Sasha Levin <sashal@kernel.org>]

On Sun, Dec 15, 2019 at 11:53:16AM +0100, gregkh@linuxfoundation.org wrote:
>
>The patch below does not apply to the 4.19-stable tree.
>If someone wants it applied there, or to any other stable or longterm
>tree, then please email the backport, including the original git commit
>id to <stable@vger.kernel.org>.
>
>thanks,
>
>greg k-h
>
>------------------ original commit in Linus's tree ------------------
>
>From 56d9e7bd3fa0f105b6670021d167744bc50ae4fe Mon Sep 17 00:00:00 2001
>From: Meng Li <Meng.Li@windriver.com>
>Date: Thu, 21 Nov 2019 12:30:46 -0600
>Subject: [PATCH] EDAC/altera: Use fast register IO for S10 IRQs
>
>When an IRQ occurs, regmap_{read,write,...}() is invoked in atomic
>context. Regmap must indicate register IO is fast so that a spinlock is
>used instead of a mutex to avoid sleeping in atomic context:
>
>  lock_acquire
>  __mutex_lock
>  mutex_lock_nested
>  regmap_lock_mutex
>  regmap_write
>  a10_eccmgr_irq_unmask
>  unmask_irq.part.0
>  irq_enable
>  __irq_startup
>  irq_startup
>  __setup_irq
>  request_threaded_irq
>  devm_request_threaded_irq
>  altr_sdram_probe
>
>Mark it so.
>
> [ bp: Massage. ]
>
>Fixes: 3dab6bd52687 ("EDAC, altera: Add support for Stratix10 SDRAM EDAC")
>Reported-by: Meng Li <Meng.Li@windriver.com>
>Signed-off-by: Meng Li <Meng.Li@windriver.com>
>Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
>Signed-off-by: Borislav Petkov <bp@suse.de>
>Cc: James Morse <james.morse@arm.com>
>Cc: linux-edac <linux-edac@vger.kernel.org>
>Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
>Cc: Robert Richter <rrichter@marvell.com>
>Cc: stable <stable@vger.kernel.org>
>Cc: Tony Luck <tony.luck@intel.com>
>Link: https://lkml.kernel.org/r/1574361048-17572-2-git-send-email-thor.thayer@linux.intel.com

Adjusted context and queued for 4.19.

-- 
Thanks,
Sasha