[PATCH 4.14 415/496] drm/meson: Fix some error handling paths in meson_drv_bind_master()

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christophe JAILLET <christophe.jail...@wanadoo.fr>

[ Upstream commit 2c18107b9d58972588cd45d89b8f58d0f033c110 ]

If one of these functions fail, we whould free 'drm', as alreadry done in
the other error handling paths, below and above.

Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller")
Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
Acked-by: Neil Armstrong <narmstr...@baylibre.com>
Signed-off-by: Neil Armstrong <narmstr...@baylibre.com>
Link: 
https://patchwork.freedesktop.org/patch/msgid/df47e03d36c2cf7bc37ec3105fc47c16555bd946.1520885192.git.christophe.jail...@wanadoo.fr
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/gpu/drm/meson/meson_drv.c |   24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

--- a/drivers/gpu/drm/meson/meson_drv.c
+++ b/drivers/gpu/drm/meson/meson_drv.c
@@ -180,35 +180,43 @@ static int meson_drv_bind_master(struct
 
        res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vpu");
        regs = devm_ioremap_resource(dev, res);
-       if (IS_ERR(regs))
-               return PTR_ERR(regs);
+       if (IS_ERR(regs)) {
+               ret = PTR_ERR(regs);
+               goto free_drm;
+       }
 
        priv->io_base = regs;
 
        res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hhi");
        /* Simply ioremap since it may be a shared register zone */
        regs = devm_ioremap(dev, res->start, resource_size(res));
-       if (!regs)
-               return -EADDRNOTAVAIL;
+       if (!regs) {
+               ret = -EADDRNOTAVAIL;
+               goto free_drm;
+       }
 
        priv->hhi = devm_regmap_init_mmio(dev, regs,
                                          &meson_regmap_config);
        if (IS_ERR(priv->hhi)) {
                dev_err(&pdev->dev, "Couldn't create the HHI regmap\n");
-               return PTR_ERR(priv->hhi);
+               ret = PTR_ERR(priv->hhi);
+               goto free_drm;
        }
 
        res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dmc");
        /* Simply ioremap since it may be a shared register zone */
        regs = devm_ioremap(dev, res->start, resource_size(res));
-       if (!regs)
-               return -EADDRNOTAVAIL;
+       if (!regs) {
+               ret = -EADDRNOTAVAIL;
+               goto free_drm;
+       }
 
        priv->dmc = devm_regmap_init_mmio(dev, regs,
                                          &meson_regmap_config);
        if (IS_ERR(priv->dmc)) {
                dev_err(&pdev->dev, "Couldn't create the DMC regmap\n");
-               return PTR_ERR(priv->dmc);
+               ret = PTR_ERR(priv->dmc);
+               goto free_drm;
        }
 
        priv->vsync_irq = platform_get_irq(pdev, 0);