tree 2bf27d77009229a26c371102655c5f81c7e68d1e
parent 6e69d6068cc2aa545544189a1ee4d2e1a32ad591
author David S. Miller <davem@sunset.davemloft.net> 1188538048 -0700
committer David S. Miller <davem@sunset.davemloft.net> 1188540411 -0700

[SPARC64]: Fix several bugs in MSI handling.

1) sun4{u,v}_build_msi() have improper return value handling.

   We should always return negative error codes, instead of
   using the magic value "0" which could in fact be a valid
   MSI number.

2) sun4{u,v}_build_msi() should return -ENOMEM instead of
   calling prom_prom() halt with kzalloc() of the interrupt
   data fails.

3) We 'remembered' the MSI number using a singleton in the
   struct device archdata area, this doesn't work for MSI-X
   which can cause multiple MSIs assosciated with one device.

   Delete that archdata member, and instead store the MSI
   number in the IRQ chip data area.

Signed-off-by: David S. Miller <davem@davemloft.net>