Messages in this thread Patch in this message | | | Date | Sun, 20 Jul 1997 21:47:27 +0200 (MET DST) | From | Uwe Ohse <> | Subject | cyclades.c under SMP-Linux-2.1.46 |
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Hello,
for some reason i didn't understand cy_probe() was called while probe_ready and intr_base_addr both were zero, leading to a kernel oops.
Linux-2.1.46, Dual-Processor Tyan Tomcat III. I first noticed the problem around 2.1.27 or .29, didn't see it with 2.0.x.
With this little patch it works again.
Cyclom driver 1.36.4.33 1997/06/27 19:00:00 built Jul 17 1997 21:57:06 Cyclom-Y/ISA #1: 0xc00d0000-0xc00d1fff, IRQ5, 8 channels starting from port 0.
Regards, Uwe -- --- linux-2.1.46/drivers/char/cyclades.c Thu Jul 17 07:47:14 1997 +++ linux/drivers/char/cyclades.c Sun Jul 20 19:19:20 1997 @@ -1065,9 +1067,16 @@ int index = 0; /* probing interrupts is only for ISA */ if (!probe_ready) { - *(intr_base_addr + (Cy_ClrIntr<<index)) = 0; + if (intr_base_addr) + *(intr_base_addr + (Cy_ClrIntr<<index)) = 0; return; } cy_irq_triggered = irq; cy_triggered |= 1 << irq;
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