[PATCH] drm/xe: fixup xe_alloc_pf_queue

[Matthew Auld <matthew.auld@intel.com>]

kzalloc expects number of bytes, therefore we should convert the number
of dw into bytes, otherwise we are likely just accessing beyond the
array causing all kinds of carnage. Also fixup the error handling while
we are here.

Fixes: 3338e4f90c14 ("drm/xe: Use topology to determine page fault queue size")
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Stuart Summers <stuart.summers@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_gt_pagefault.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_gt_pagefault.c b/drivers/gpu/drm/xe/xe_gt_pagefault.c
index 401c0527d914..e4510e56e4a2 100644
--- a/drivers/gpu/drm/xe/xe_gt_pagefault.c
+++ b/drivers/gpu/drm/xe/xe_gt_pagefault.c
@@ -417,7 +417,10 @@ static int xe_alloc_pf_queue(struct xe_gt *gt, struct pf_queue *pf_queue)
 		(num_eus + XE_NUM_HW_ENGINES) * PF_MSG_LEN_DW;
 
 	pf_queue->gt = gt;
-	pf_queue->data = kzalloc(pf_queue->num_dw, GFP_KERNEL);
+	pf_queue->data = kzalloc(pf_queue->num_dw * sizeof(u32), GFP_KERNEL);
+	if (!pf_queue->data)
+		return -ENOMEM;
+
 	spin_lock_init(&pf_queue->lock);
 	INIT_WORK(&pf_queue->worker, pf_queue_work_func);
 
-- 
2.46.0