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| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2018-05-24 10:58:25 +0300 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2018-05-24 19:14:46 +0300 |
| commit | 2bc5ff0bdc00d81d719dad74589317a260d583ed (patch) | |
| tree | 99985ce9d3926353a5cfcd82a7676120ba62307d /drivers | |
| parent | bdcc02cf1bb508fc700df7662f55058f651f2621 (diff) | |
| download | linux-2bc5ff0bdc00d81d719dad74589317a260d583ed.tar.bz2 | |
drm/omap: fix NULL deref crash with SDI displays
Fix a NULL deref bug introduced in commit 24aac6011f70 ("drm: omapdrm:
sdi: Allocate the sdi private data structure dynamically").
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/2f803bfc-3ffe-332a-7b9a-d59a39db4630@ti.com
Fixes: 24aac6011f70 ("drm: omapdrm: sdi: Allocate the sdi private data structure dynamically")
Reported-by: Tony Lindgren <tony@atomide.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Benoit Parrot <bparrot@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/dss/sdi.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/omapdrm/dss/sdi.c b/drivers/gpu/drm/omapdrm/dss/sdi.c index 68a40ae26f5b..1e2c931f6acf 100644 --- a/drivers/gpu/drm/omapdrm/dss/sdi.c +++ b/drivers/gpu/drm/omapdrm/dss/sdi.c @@ -82,7 +82,7 @@ static int sdi_calc_clock_div(struct sdi_device *sdi, unsigned long pclk, struct dispc_clock_info *dispc_cinfo) { int i; - struct sdi_clk_calc_ctx ctx = { .sdi = sdi }; + struct sdi_clk_calc_ctx ctx; /* * DSS fclk gives us very few possibilities, so finding a good pixel @@ -95,6 +95,9 @@ static int sdi_calc_clock_div(struct sdi_device *sdi, unsigned long pclk, bool ok; memset(&ctx, 0, sizeof(ctx)); + + ctx.sdi = sdi; + if (pclk > 1000 * i * i * i) ctx.pck_min = max(pclk - 1000 * i * i * i, 0lu); else |