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@linu...
Adjusted context and queued for 4.19.