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[acpi] Allow time for ACPI power off to take effect

The ACPI power off sequence may not take effect immediately.  Delay
for one second, to eliminate potentially confusing log messages such
as "Could not power off: Error 0x43902001 (http://ipx".

Reported-by: Leonid Vasetsky <leonidv@velostrata.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
tags/v1.20.1
Michael Brown il y a 8 ans
Parent
révision
df85901768
1 fichiers modifiés avec 6 ajouts et 0 suppressions
  1. 6
    0
      src/arch/x86/interface/pcbios/acpipwr.c

+ 6
- 0
src/arch/x86/interface/pcbios/acpipwr.c Voir le fichier

@@ -23,6 +23,7 @@
23 23
 
24 24
 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25 25
 
26
+#include <unistd.h>
26 27
 #include <errno.h>
27 28
 #include <byteswap.h>
28 29
 #include <realmode.h>
@@ -111,6 +112,11 @@ int acpi_poweroff ( void ) {
111 112
 			 ACPI_PM1_CNT_SLP_EN ), pm1b_cnt );
112 113
 	}
113 114
 
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+	/* On some systems, execution will continue briefly.  Delay to
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+	 * avoid potentially confusing log messages.
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+	 */
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+	mdelay ( 1000 );
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+
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 	DBGC ( colour, "ACPI power off failed\n" );
115 121
 	return -EPROTO;
116 122
 }

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