diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0261-drm-vc4_dsi-Fix-DMA-channel-and-memory-leak-in-vc4-3.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0261-drm-vc4_dsi-Fix-DMA-channel-and-memory-leak-in-vc4-3.patch | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0261-drm-vc4_dsi-Fix-DMA-channel-and-memory-leak-in-vc4-3.patch b/target/linux/bcm27xx/patches-5.4/950-0261-drm-vc4_dsi-Fix-DMA-channel-and-memory-leak-in-vc4-3.patch deleted file mode 100644 index 9fd796850f..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0261-drm-vc4_dsi-Fix-DMA-channel-and-memory-leak-in-vc4-3.patch +++ /dev/null @@ -1,135 +0,0 @@ -From cbda8e6de54f8a0f194e990f53e1cfad642af1be Mon Sep 17 00:00:00 2001 -From: Chris Miller <chris@mesl2.co.uk> -Date: Wed, 26 Jun 2019 10:40:30 +0100 -Subject: [PATCH] drm: vc4_dsi: Fix DMA channel and memory leak in vc4 - (#3012) - -Signed-off-by: Chris G Miller <chris@creative-electronics.net> ---- - drivers/gpu/drm/vc4/vc4_dsi.c | 35 ++++++++++++++++++++++++----------- - 1 file changed, 24 insertions(+), 11 deletions(-) - ---- a/drivers/gpu/drm/vc4/vc4_dsi.c -+++ b/drivers/gpu/drm/vc4/vc4_dsi.c -@@ -1485,9 +1485,11 @@ static int vc4_dsi_bind(struct device *d - /* DSI1 has a broken AXI slave that doesn't respond to writes - * from the ARM. It does handle writes from the DMA engine, - * so set up a channel for talking to it. -+ * Where possible managed resource providers are used, but the DMA channel -+ * must - if acquired - be explicitly released prior to taking an error exit path. - */ - if (dsi->port == 1) { -- dsi->reg_dma_mem = dma_alloc_coherent(dev, 4, -+ dsi->reg_dma_mem = dmam_alloc_coherent(dev, 4, - &dsi->reg_dma_paddr, - GFP_KERNEL); - if (!dsi->reg_dma_mem) { -@@ -1506,6 +1508,8 @@ static int vc4_dsi_bind(struct device *d - return ret; - } - -+ /* From here on, any error exits must release the dma channel */ -+ - /* Get the physical address of the device's registers. The - * struct resource for the regs gives us the bus address - * instead. -@@ -1532,7 +1536,7 @@ static int vc4_dsi_bind(struct device *d - if (ret) { - if (ret != -EPROBE_DEFER) - dev_err(dev, "Failed to get interrupt: %d\n", ret); -- return ret; -+ goto rel_dma_exit; - } - - dsi->escape_clock = devm_clk_get(dev, "escape"); -@@ -1540,7 +1544,7 @@ static int vc4_dsi_bind(struct device *d - ret = PTR_ERR(dsi->escape_clock); - if (ret != -EPROBE_DEFER) - dev_err(dev, "Failed to get escape clock: %d\n", ret); -- return ret; -+ goto rel_dma_exit; - } - - dsi->pll_phy_clock = devm_clk_get(dev, "phy"); -@@ -1548,7 +1552,7 @@ static int vc4_dsi_bind(struct device *d - ret = PTR_ERR(dsi->pll_phy_clock); - if (ret != -EPROBE_DEFER) - dev_err(dev, "Failed to get phy clock: %d\n", ret); -- return ret; -+ goto rel_dma_exit; - } - - dsi->pixel_clock = devm_clk_get(dev, "pixel"); -@@ -1556,7 +1560,7 @@ static int vc4_dsi_bind(struct device *d - ret = PTR_ERR(dsi->pixel_clock); - if (ret != -EPROBE_DEFER) - dev_err(dev, "Failed to get pixel clock: %d\n", ret); -- return ret; -+ goto rel_dma_exit; - } - - ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, -@@ -1571,26 +1575,28 @@ static int vc4_dsi_bind(struct device *d - if (ret == -ENODEV) - return 0; - -- return ret; -+ goto rel_dma_exit; - } - - if (panel) { - dsi->bridge = devm_drm_panel_bridge_add(dev, panel, - DRM_MODE_CONNECTOR_DSI); -- if (IS_ERR(dsi->bridge)) -- return PTR_ERR(dsi->bridge); -+ if (IS_ERR(dsi->bridge)){ -+ ret = PTR_ERR(dsi->bridge); -+ goto rel_dma_exit; -+ } - } - - /* The esc clock rate is supposed to always be 100Mhz. */ - ret = clk_set_rate(dsi->escape_clock, 100 * 1000000); - if (ret) { - dev_err(dev, "Failed to set esc clock: %d\n", ret); -- return ret; -+ goto rel_dma_exit; - } - - ret = vc4_dsi_init_phy_clocks(dsi); - if (ret) -- return ret; -+ goto rel_dma_exit; - - if (dsi->port == 1) - vc4->dsi1 = dsi; -@@ -1602,7 +1608,7 @@ static int vc4_dsi_bind(struct device *d - ret = drm_bridge_attach(dsi->encoder, dsi->bridge, NULL); - if (ret) { - dev_err(dev, "bridge attach failed: %d\n", ret); -- return ret; -+ goto rel_dma_exit; - } - /* Disable the atomic helper calls into the bridge. We - * manually call the bridge pre_enable / enable / etc. calls -@@ -1619,6 +1625,11 @@ static int vc4_dsi_bind(struct device *d - pm_runtime_enable(dev); - - return 0; -+ -+rel_dma_exit: -+ dma_release_channel(dsi->reg_dma_chan); -+ -+ return ret; - } - - static void vc4_dsi_unbind(struct device *dev, struct device *master, -@@ -1633,6 +1644,8 @@ static void vc4_dsi_unbind(struct device - - vc4_dsi_encoder_destroy(dsi->encoder); - -+ dma_release_channel(dsi->reg_dma_chan); -+ - if (dsi->port == 1) - vc4->dsi1 = NULL; - } |