linux-kernel - [PATCH] drivers/char/pcmcia/synclink

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Message-id: <060E5EC8-93F4-4AF1-889F-04A13378CB8D@me.com>
Date:	Fri, 02 Oct 2009 19:37:21 +0900
From:	lenrek@...com
To:	linux-kernel@...r.kernel.org
Cc:	lenrek@...com
Subject: [PATCH] drivers/char/pcmcia/synclink_cs.c: BKL pushdown?

I found the counterpart of function mgslpc_wait_until_sent
in drivers/char/synclinkmp.c (wait_until_sent) is modified to
issue (un)lock_kernel.  This patch does the same modification.

However, I'm afraid similar modifications are necessary further on  
functions
mgslpc_ioctl and mgslpc_write_room.

--- linux-2.6.31.1/drivers/char/pcmcia/synclink_cs.c	2009-10-02  
17:01:23.000000000 +0900
+++ linux/drivers/char/pcmcia/synclink_cs.c	2009-10-02  
17:23:59.000000000 +0900
@@ -2442,6 +2442,8 @@
  	if (!info )
  		return;

+	lock_kernel();
+
  	if (debug_level >= DEBUG_LEVEL_INFO)
  		printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
  			 __FILE__,__LINE__, info->device_name );
@@ -2490,6 +2492,7 @@
  	}

  exit:
+	unlock_kernel();
  	if (debug_level >= DEBUG_LEVEL_INFO)
  		printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
  			 __FILE__,__LINE__, info->device_name );

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