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23 October 2021, 00:29:24 UTC
Revision 6593178dd46d64a5bcb0402a4f3acd95b0687abd authored by James Bottomley on 18 November 2005, 22:13:33 UTC, committed by Bartlomiej Zolnierkiewicz on 18 November 2005, 22:13:33 UTC 
[PATCH] ide: fix ide_toggle_bounce() to not try to bounce if we have an IOMMU
 
The following patch fixes a crash caused by attempting to bounce buffer
when an IDE CD-ROM is used on a machine with an IO-MMU. [At least, this
patch fixes things so I can use my IDE CD-ROM behind an ns87415 on a 
HP PA-RISC workstation.]

Signed-off-by: James Bottomley <jejb@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
1 parent c37ea21
Raw File
Tip revision: 6593178dd46d64a5bcb0402a4f3acd95b0687abd authored by James Bottomley on 18 November 2005, 22:13:33 UTC
[PATCH] ide: fix ide_toggle_bounce() to not try to bounce if we have an IOMMU
Tip revision: 6593178
bust_spinlocks.c 
/*
 * lib/bust_spinlocks.c
 *
 * Provides a minimal bust_spinlocks for architectures which don't have one of their own.
 *
 * bust_spinlocks() clears any spinlocks which would prevent oops, die(), BUG()
 * and panic() information from reaching the user.
 */

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/tty.h>
#include <linux/wait.h>
#include <linux/vt_kern.h>


void bust_spinlocks(int yes)
{
	if (yes) {
		oops_in_progress = 1;
	} else {
		int loglevel_save = console_loglevel;
#ifdef CONFIG_VT
		unblank_screen();
#endif
		oops_in_progress = 0;
		/*
		 * OK, the message is on the console.  Now we call printk()
		 * without oops_in_progress set so that printk() will give klogd
		 * and the blanked console a poke.  Hold onto your hats...
		 */
		console_loglevel = 15;		/* NMI oopser may have shut the console up */
		printk(" ");
		console_loglevel = loglevel_save;
	}
}
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