diff options
| author |   Meng Li <Meng.Li@windriver.com> | 2019-11-21 12:30:46 -0600 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2019-11-22 10:14:56 +0100 |
| commit | 56d9e7bd3fa0f105b6670021d167744bc50ae4fe (patch) | |
| tree | d419ef079c0786663920275c81d197cad013737a /drivers/edac | |
| parent | EDAC/ghes: Do not warn when incrementing refcount on 0 (diff) | |
| download | linux-dev-56d9e7bd3fa0f105b6670021d167744bc50ae4fe.tar.xz linux-dev-56d9e7bd3fa0f105b6670021d167744bc50ae4fe.zip | |
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
Diffstat (limited to 'drivers/edac')
| -rw-r--r-- | drivers/edac/altera_edac.c | 1 |
1 files changed, 1 insertions, 0 deletions
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> ***********/ |