From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 15 Dec 2020 03:03:27 +0000 (-0800)
Subject: ide: remove BUG_ON(in_interrupt() || irqs_disabled()) from ide_unregister()
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=ec680c1990e70c44d6b4452300a62b15f5c51f9c;p=uclinux-h8%2Flinux.git

ide: remove BUG_ON(in_interrupt() || irqs_disabled()) from ide_unregister()

In the discussion about preempt count consistency across kernel
configurations:

 https://lore.kernel.org/r/20200914204209.256266093@linutronix.de/

it was concluded that the usage of in_interrupt() and related context
checks should be removed from non-core code.

Both BUG_ON()s in ide-probe.c were introduced in commit
   4015c949fb465 ("[PATCH] update ide core")

when ide_unregister() was extended with semaphore based locking.  Both
checks won't complain about disabled preemption which is also wrong.

The might_sleep() in today's mutex_lock() will complain about the
missuses.

Remove the BUG_ON() statements.

Link: https://lkml.kernel.org/r/20201120092421.1023428-3-bigeasy@linutronix.de
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Jens Axboe <axboe@kernel.dk>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 1ddc45a04418..430b29e0abdb 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1592,9 +1592,6 @@ EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
 
 static void ide_unregister(ide_hwif_t *hwif)
 {
-	BUG_ON(in_interrupt());
-	BUG_ON(irqs_disabled());
-
 	mutex_lock(&ide_cfg_mtx);
 
 	if (hwif->present) {