dma-debug: avoid spinlock recursion when disabling dma-debug
With netconsole (at least) the pr_err("... disablingn") call can recurse back into the dma-debug code, where it'll try to grab free_entries_lock again. Avoid the problem by doing the printk after dropping the lock. Link: http://lkml.kernel.org/r/1463678421-18683-1-git-send-email-ville.syrjala@linux.intel.com Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
7ef949d77f
commit
3017cd63f2
|
@ -657,9 +657,9 @@ static struct dma_debug_entry *dma_entry_alloc(void)
|
|||
spin_lock_irqsave(&free_entries_lock, flags);
|
||||
|
||||
if (list_empty(&free_entries)) {
|
||||
pr_err("DMA-API: debugging out of memory - disabling\n");
|
||||
global_disable = true;
|
||||
spin_unlock_irqrestore(&free_entries_lock, flags);
|
||||
pr_err("DMA-API: debugging out of memory - disabling\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in New Issue