drm/omap: dsi: Fix crash in DSI debug dumps

Reading any of the DSI debugfs files results in a crash, as wrong
pointer is passed to the dump functions, and the dump functions use a
wrong pointer. This patch fixes DSI debug dumps.

Fixes: 997304635cd1 ("drm/omap: dsi: Simplify debugfs implementation")
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190111035120.20668-3-laurent.pinchart@ideasonboard.com

diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
index 00a9c2ab9e6c8932baecc9b5591b07626201c589..277f9dd2ec8ca3ec28b2e4c1b0107c6555b6b902 100644 (file)
--- a/drivers/gpu/drm/omapdrm/dss/dsi.c
+++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
@@ -1406,7 +1406,7 @@ static void dsi_pll_disable(struct dss_pll *pll)
 
 static int dsi_dump_dsi_clocks(struct seq_file *s, void *p)
 {
-       struct dsi_data *dsi = p;
+       struct dsi_data *dsi = s->private;
        struct dss_pll_clock_info *cinfo = &dsi->pll.cinfo;
        enum dss_clk_source dispc_clk_src, dsi_clk_src;
        int dsi_module = dsi->module_id;
@@ -1467,7 +1467,7 @@ static int dsi_dump_dsi_clocks(struct seq_file *s, void *p)
 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
 static int dsi_dump_dsi_irqs(struct seq_file *s, void *p)
 {
-       struct dsi_data *dsi = p;
+       struct dsi_data *dsi = s->private;
        unsigned long flags;
        struct dsi_irq_stats stats;
 
@@ -1558,7 +1558,7 @@ static int dsi_dump_dsi_irqs(struct seq_file *s, void *p)
 
 static int dsi_dump_dsi_regs(struct seq_file *s, void *p)
 {
-       struct dsi_data *dsi = p;
+       struct dsi_data *dsi = s->private;
 
        if (dsi_runtime_get(dsi))
                return 0;
@@ -5083,15 +5083,15 @@ static int dsi_bind(struct device *dev, struct device *master, void *data)
 
        snprintf(name, sizeof(name), "dsi%u_regs", dsi->module_id + 1);
        dsi->debugfs.regs = dss_debugfs_create_file(dss, name,
-                                                   dsi_dump_dsi_regs, &dsi);
+                                                   dsi_dump_dsi_regs, dsi);
 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
        snprintf(name, sizeof(name), "dsi%u_irqs", dsi->module_id + 1);
        dsi->debugfs.irqs = dss_debugfs_create_file(dss, name,
-                                                   dsi_dump_dsi_irqs, &dsi);
+                                                   dsi_dump_dsi_irqs, dsi);
 #endif
        snprintf(name, sizeof(name), "dsi%u_clks", dsi->module_id + 1);
        dsi->debugfs.clks = dss_debugfs_create_file(dss, name,
-                                                   dsi_dump_dsi_clocks, &dsi);
+                                                   dsi_dump_dsi_clocks, dsi);
 
        return 0;
 }