linux-kernel - [PATCH -next] drm/nouveau/secboot/gm20b: fix the error return code in gm20b_secboot_tegra_read

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Message-Id: <20170425143642.1342-1-weiyj.lk@gmail.com>
Date:   Tue, 25 Apr 2017 14:36:42 +0000
From:   Wei Yongjun <weiyj.lk@...il.com>
To:     Ben Skeggs <bskeggs@...hat.com>, David Airlie <airlied@...ux.ie>,
        Alexandre Courbot <acourbot@...dia.com>
Cc:     Wei Yongjun <weiyongjun1@...wei.com>,
        dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH -next] drm/nouveau/secboot/gm20b: fix the error return code in gm20b_secboot_tegra_read_wpr()

From: Wei Yongjun <weiyongjun1@...wei.com>

The error return code PTR_ERR(mc) is always 0 since mc is
equal to 0 in this error handling case.

Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
 drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm20b.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm20b.c b/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm20b.c
index b10ed59..30491d1 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm20b.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/secboot/gm20b.c
@@ -48,7 +48,7 @@ gm20b_secboot_tegra_read_wpr(struct gm200_secboot *gsb, u32 mc_base)
 	mc = ioremap(mc_base, 0xd00);
 	if (!mc) {
 		nvkm_error(&sb->subdev, "Cannot map Tegra MC registers\n");
-		return PTR_ERR(mc);
+		return -ENOMEM;
 	}
 	sb->wpr_addr = ioread32_native(mc + MC_SECURITY_CARVEOUT2_BOM_0) |
 	      ((u64)ioread32_native(mc + MC_SECURITY_CARVEOUT2_BOM_HI_0) << 32);