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drm/nv4c/mc: disable msi

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Several users have, over time, reported issues with MSI on these IGPs.
They're old, rarely available, and MSI doesn't provide such huge
advantages on them. Just disable.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=87361
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=74492
Fixes: fa8c9ac72f ("drm/nv4c/mc: nv4x igp's have a different msi rearm register")
Cc: stable@vger.kernel.org
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ilia Mirkin 2014-12-16 13:55:38 -05:00 committed by Ben Skeggs
parent e9d9123899
commit 4761703bd0
1 changed files with 0 additions and 8 deletions
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8
drivers/gpu/drm/nouveau/core/subdev/mc/nv4c.c
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@ -24,13 +24,6 @@
#include "nv04.h"
static void
nv4c_mc_msi_rearm(struct nouveau_mc *pmc)
{
struct nv04_mc_priv *priv = (void *)pmc;
nv_wr08(priv, 0x088050, 0xff);
}
struct nouveau_oclass *
nv4c_mc_oclass = &(struct nouveau_mc_oclass) {
.base.handle = NV_SUBDEV(MC, 0x4c),
@ -41,5 +34,4 @@ nv4c_mc_oclass = &(struct nouveau_mc_oclass) {
.fini = _nouveau_mc_fini,
},
.intr = nv04_mc_intr,
.msi_rearm = nv4c_mc_msi_rearm,
}.base;