Messages in this thread Patch in this message | | | Subject | Problem initializing PCI boards where IRQ has to be guessed | Date | Thu, 30 Sep 2004 16:22:40 -0400 | From | "Marty Leisner" <> |
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I had this problem in 2.4.27...the same code is in 2.6.8.1
If the bios doesn't assign an interrupt, the guessing algorithm is able to work only in a very special case (when the mask is one bit).
In 2.4.27 (I have lxr.linux.no for 2.4.26, its the same in 2.6.8.1)
933 if (!irq) { 934 DBG(" ... failed\n"); 935 if (newirq && mask == (1 << newirq)) { 936 msg = "Guessed"; 937 irq = newirq; 938 } else 939 return 0;
In 2.4.27 I have: @@ -942,7 +939,8 @@ if (!irq) { DBG(" ... failed\n"); - - if (newirq && mask == (1 << newirq)) { + if (newirq && (mask & (1 << newirq))) { + /* newirq is a routable interrupt */ msg = "Guessed"; irq = newirq; } else
marty mleisner@eng.mc.xerox.com Don't confuse education with schooling. Milton Friedman to Yogi Berra
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