[PATCH] irqpoll

Anyone reporting a stuck IRQ should try these options.  Its effectiveness
varies we've found in the Fedora case.  Quite a few systems with misdescribed
IRQ routing just work when you use irqpoll.  It also fixes up the VIA systems
although thats now fixed with the VIA quirk (which we could just make default
as its what Redmond OS does but Linus didn't like it historically).

A small number of systems have jammed IRQ sources or misdescribes that cause
an IRQ that we have no handler registered anywhere for.  In those cases it
doesn't help.

Signed-off-by: Alan Cox <number6@the-village.bc.nu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 0f71251f12b9..67e99f144199 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -437,6 +437,10 @@ running once the system is up.
                         Format: {"of[f]" | "sk[ipmbr]"}
                         See comment in arch/i386/boot/edd.S
 
+        edd             [EDD]
+                        Format: {"of[f]" | "sk[ipmbr]"}
+                        See comment in arch/i386/boot/edd.S
+
         eicon=          [HW,ISDN] 
                         Format: <id>,<membase>,<irq>
 
@@ -622,6 +626,17 @@ running once the system is up.
         ips=            [HW,SCSI] Adaptec / IBM ServeRAID controller
                         See header of drivers/scsi/ips.c.
 
+        irqfixup        [HW]
+                        When an interrupt is not handled search all handlers
+                        for it. Intended to get systems with badly broken
+                        firmware running.
+
+        irqpoll         [HW]
+                        When an interrupt is not handled search all handlers
+                        for it. Also check all handlers each timer
+                        interrupt. Intended to get systems with badly broken
+                        firmware running.
+
         isapnp=         [ISAPNP]
                         Format: <RDP>, <reset>, <pci_scan>, <verbosity>