linux-kernel - [PATCH 4/5] i915: alloc_oa_regs(): get rid of pointless access

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Message-Id: <20200529004145.4111807-4-viro@ZenIV.linux.org.uk>
Date:   Fri, 29 May 2020 01:41:44 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Jani Nikula <jani.nikula@...ux.intel.com>
Subject: [PATCH 4/5] i915: alloc_oa_regs(): get rid of pointless access_ok()

From: Al Viro <viro@...iv.linux.org.uk>

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 drivers/gpu/drm/i915/i915_perf.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index 551be589d6f4..a52461016935 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -3949,9 +3949,6 @@ static struct i915_oa_reg *alloc_oa_regs(struct i915_perf *perf,
 	if (!n_regs)
 		return NULL;
 
-	if (!access_ok(regs, n_regs * sizeof(u32) * 2))
-		return ERR_PTR(-EFAULT);
-
 	/* No is_valid function means we're not allowing any register to be programmed. */
 	GEM_BUG_ON(!is_valid);
 	if (!is_valid)
-- 
2.11.0