On Thu, Nov 21, 2019 at 12:30:46PM -0600, thor.thayer@xxxxxxxxxxxxxxx wrote: > From: Meng Li <Meng.Li@xxxxxxxxxxxxx> > > When an irq occurs in altera edac driver, regmap_xxx() 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. > > Fixes mutex-lock error > lock_acquire+0xfc/0x288 > __mutex_lock+0x8c/0x808 > mutex_lock_nested+0x3c/0x50 > regmap_lock_mutex+0x24/0x30 > regmap_write+0x40/0x78 > a10_eccmgr_irq_unmask+0x34/0x40 > unmask_irq.part.0+0x30/0x50 > irq_enable+0x74/0x80 > __irq_startup+0x80/0xa8 > irq_startup+0x70/0x150 > __setup_irq+0x650/0x6d0 > request_threaded_irq+0xe4/0x180 > devm_request_threaded_irq+0x7c/0xf0 > altr_sdram_probe+0x2c4/0x600 > <snip> > > Upstream fix pending [1] (common code uses fast mode) > [1] https://lkml.org/lkml/2019/11/7/1014 > > Fixes: 3dab6bd52687 ("EDAC, altera: Add support for Stratix10 SDRAM EDAC") > Cc: stable@xxxxxxxxxxxxxxx > Reported-by: Meng Li <Meng.Li@xxxxxxxxxxxxx> > Signed-off-by: Meng Li <Meng.Li@xxxxxxxxxxxxx> > Reviewed-by: Thor Thayer <thor.thayer@xxxxxxxxxxxxxxx> > --- > v2 Change Author to Meng Li & Reviewed-by: Thor Thayer You don't absolutely need to have Reviewed-by: you, when you send someone else's patch. The fact that you send it, kinda implies you've reviewed it. I sure hope so, at least :-) What the patch must have is your SOB unterneath. I'll fix that up when applying. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
