From 795eb5c4a73bee30e8c2dbb29174b329da56051c Mon Sep 17 00:00:00 2001 From: Kenji Kaneshige Date: Tue, 2 May 2006 11:11:54 +0900 Subject: [PATCH] [PATCH] SHPC: Fix SHPC Logical Slot Register bits access Current SHPCHP driver doesn't take care of RsvdP/RsvdZ[*] bits in logical slot registers. This might cause unpredicable results. This patch fixes this bug. [*] RsvdP and RsvdZ are defined in SHPC spec as follows: RsvdP - Reserved and Preserved. Register bits of this type are reserved for future use as R/W bits. The value read is undefined. Writes are ignored. Software must follow These rules when accessing RsvdP bits: - Software must ignore RsvdP bits when testing values read from these registers. - Software must not depend on RsvdP bit's ability to retain information when written - Software must always write back the value read in the RsvdP bits when writing one of these registers. RsvdZ - Reserved and Zero. Register bits of this type are reserved for future use as R/WC bits. The value read is undefined. Writes are ignored. Software must follow these rules when accessing RsvdZ bits: - Software must ignore RsvdZ bits when testing values read from these registers. - Software must not depends on a RsvdZ bit's ability to retain information when written. - Software must always write 0 to RsvdZ bits when writing one of these register. Signed-off-by: Kenji Kaneshige Cc: Kristen Accardi Signed-off-by: Greg Kroah-Hartman --- Reading git-format-patch failed