Commit 607856a8 authored by Colin Ian King's avatar Colin Ian King Committed by Jani Nikula

drm/i915/display: fix missing null check on allocated dsb object

Currently there is no null check for a failed memory allocation
on the dsb object and without this a null pointer dereference
error can occur. Fix this by adding a null check.

Note: added a drm_err message in keeping with the error message style
in the function.

Addresses-Coverity: ("Dereference null return")
Fixes: afeda4f3 ("drm/i915/dsb: Pre allocate and late cleanup of cmd buffer")
Signed-off-by: default avatarColin Ian King <colin.king@canonical.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200616114221.73971-1-colin.king@canonical.com
parent 0e2feab5
......@@ -271,6 +271,10 @@ void intel_dsb_prepare(struct intel_crtc_state *crtc_state)
return;
dsb = kmalloc(sizeof(*dsb), GFP_KERNEL);
if (!dsb) {
drm_err(&i915->drm, "DSB object creation failed\n");
return;
}
wakeref = intel_runtime_pm_get(&i915->runtime_pm);
......
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