Unverified Commit b0b2b50c authored by Vinay Belgaumkar's avatar Vinay Belgaumkar Committed by Rodrigo Vivi
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drm/xe/guc: Prevent use of uninitialized mutex 



When skip_guc_pc is set and/or this is for a VF.

Fixes: 3b1592fb ("drm/xe/lnl: Apply Wa_22019338487")
Signed-off-by: default avatarVinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240701231529.2582452-1-vinay.belgaumkar@intel.com


Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
parent 2d46ecc9

drivers/gpu/drm/xe/xe_guc_pc.c

+4 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include "xe_mmio.h"

#include "xe_pcode.h"

#include "xe_pm.h"

#include "xe_sriov.h"

#include "xe_wa.h"



#define MCHBAR_MIRROR_BASE_SNB	0x140000
@@ -825,6 +826,9 @@ int xe_guc_pc_restore_stashed_freq(struct xe_guc_pc *pc) 
{

	int ret = 0;



	if (IS_SRIOV_VF(pc_to_xe(pc)) || pc_to_xe(pc)->info.skip_guc_pc)

		return 0;



	mutex_lock(&pc->freq_lock);

	ret = pc_set_max_freq(pc, pc->stashed_max_freq);

	if (!ret)