[PATCH 4.16 174/272] drm/meson: Fix some error handling paths in meson_drv_bind_master()

Greg Kroah-Hartman
2018-05-28T11:12:00Z

From: Christophe JAILLET <christophe.jaillet@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.jaillet@wanadoo.fr>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/df47e03d36c2cf7bc37ec3105fc47c16555bd946.1520885192.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@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
@@ -189,35 +189,43 @@ 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);