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v0.8.1
https://github.com/torvalds/linux
02 December 2023, 22:23:51 UTC
Revision 3e3183bab0257a6d02038658c53b491e1378612f authored by David Woodhouse on 05 August 2006, 19:15:19 UTC, committed by Linus Torvalds on 06 August 2006, 15:57:49 UTC 
[PATCH] SCX200_ACB: eliminate spurious timeout errors
 
While busy-waiting for completion, check the hardware after scheduling;
don't schedule and then immediately check the _timeout_.  If the yield()
took a long time (as it does on my OLPC prototype board when it's busy),
we'd report a timeout even though the hardware was now ready.

This fixes it, and also switches the yield() for a cond_resched() because
we don't actually want to be _that_ nice about it.  I see nice
tightly-packed SMBus transactions now, rather than waiting for milliseconds
between successive phases.

Actually, we shouldn't be busy-waiting here at all.  We should be using
interrupts.  That's an exercise for another day though.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Cc: Christer Weinigel <wingel@nano-system.com>
Cc: <Jordan.Crouse@amd.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1 parent 225add6
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Tip revision: 3e3183bab0257a6d02038658c53b491e1378612f authored by David Woodhouse on 05 August 2006, 19:15:19 UTC
[PATCH] SCX200_ACB: eliminate spurious timeout errors
Tip revision: 3e3183b
Kconfig 
#
# Zorro configuration
#
config ZORRO_NAMES
	bool "Zorro device name database"
	depends on ZORRO
	---help---
	  By default, the kernel contains a database of all known Zorro device
	  names to make the information in /proc/iomem comprehensible to the
	  user. This database increases the size of the kernel image by about
	  15KB, but it gets freed after the system boots up, so it doesn't
	  take up kernel memory. Anyway, if you are building an installation
	  floppy or kernel for an embedded system where kernel image size
	  really matters, you can disable this feature and you'll get device
	  ID numbers instead of names.

	  When in doubt, say Y.
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