[PATCH] drm/nouveau/bios: 0 means success for nvbios_extend

[Jan Vesely]

Bugzilla:https://bugs.freedesktop.org/show_bug.cgi?id=89047

CC: David Airlie <airlied at linux.ie>
CC: Ben Skeggs <bskeggs at redhat.com>
CC: dri-devel at lists.freedesktop.org
CC: linux-kernel at vger.kernel.org
Signed-off-by: Jan Vesely <jano.vesely at gmail.com>
---

It's needed for 3.19 too

 drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c     | 2 +-
 drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c
index 8c2b7cb..f566ac8 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadow.c
@@ -44,7 +44,7 @@ shadow_fetch(struct nvkm_bios *bios, u32 upto)
 	const u32 limit = (upto + 3) & ~3;
 	const u32 start = bios->size;
 	void *data = mthd->data;
-	if (nvbios_extend(bios, limit) > 0) {
+	if (nvbios_extend(bios, limit) >= 0) {
 		u32 read = mthd->func->read(data, start, limit - start, bios);
 		bios->size = start + read;
 	}
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c
index 1fbd93b..f9d0eb5 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c
@@ -52,7 +52,7 @@ acpi_read_fast(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
 	u32 start = offset & ~0x00000fff;
 	u32 fetch = limit - start;
 
-	if (nvbios_extend(bios, limit) > 0) {
+	if (nvbios_extend(bios, limit) >= 0) {
 		int ret = nouveau_acpi_get_bios_chunk(bios->data, start, fetch);
 		if (ret == fetch)
 			return fetch;
@@ -73,7 +73,7 @@ acpi_read_slow(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
 	u32 start = offset & ~0xfff;
 	u32 fetch = 0;
 
-	if (nvbios_extend(bios, limit) > 0) {
+	if (nvbios_extend(bios, limit) >= 0) {
 		while (start + fetch < limit) {
 			int ret = nouveau_acpi_get_bios_chunk(bios->data,
 							      start + fetch,
-- 
2.0.5