| Message ID | 1576407196157167@kroah.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | FAILED: patch "[PATCH] EDAC/altera: Use fast register IO for S10 IRQs" failed to apply to 4.19-stable tree | expand |
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.
diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c index fbda4b876afd..0be3d1b17f03 100644 --- a/drivers/edac/altera_edac.c +++ b/drivers/edac/altera_edac.c @@ -560,6 +560,7 @@ static const struct regmap_config s10_sdram_regmap_cfg = { .reg_write = s10_protected_reg_write, .use_single_read = true, .use_single_write = true, + .fast_io = true, }; /************** </Stratix10 EDAC Memory Controller Functions> ***********/