drm/i915/perf: Fix compiler warning for string truncation

Web:        https://git.kernel.org/torvalds/c/75b0e73023ef7994348d619e9adadab0e96bb195
Commit:     75b0e73023ef7994348d619e9adadab0e96bb195
Parent:     7928b2cbe55b2a410a0f5c1f154610059c57b1b2
Refname:    refs/heads/master
Author:     Chris Wilson <[email protected]>
AuthorDate: Thu Feb 8 10:24:02 2018 +0000
Committer:  Rodrigo Vivi <[email protected]>
CommitDate: Mon Feb 12 23:34:50 2018 -0800

    drm/i915/perf: Fix compiler warning for string truncation
    
    drivers/gpu/drm/i915/i915_oa_cflgt3.c: In function ‘i915_perf_load_test_config_cflgt3’:
    drivers/gpu/drm/i915/i915_oa_cflgt3.c:87:2: error: ‘strncpy’ output truncated before terminating nul copying 36 bytes from a string of the same length [-Werror=stringop-truncation]
    
    v2: strlcpy
    
    Fixes: 4407eaa9b0cc ("drm/i915/perf: add support for Coffeelake GT3")
    Signed-off-by: Chris Wilson <[email protected]>
    Cc: Lionel Landwerlin <[email protected]>
    Cc: Matthew Auld <[email protected]>
    Reviewed-by: Lionel Landwerlin <[email protected]>
    Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
    (cherry picked from commit 43df81d324cdd7056ad0ce3df709aff8dce856b7)
    Signed-off-by: Rodrigo Vivi <[email protected]>
---
 drivers/gpu/drm/i915/i915_oa_cflgt3.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_oa_cflgt3.c b/drivers/gpu/drm/i915/i915_oa_cflgt3.c
index 42ff06fe54a3..792facdb6702 100644
--- a/drivers/gpu/drm/i915/i915_oa_cflgt3.c
+++ b/drivers/gpu/drm/i915/i915_oa_cflgt3.c
@@ -84,9 +84,9 @@ show_test_oa_id(struct device *kdev, struct device_attribute *attr, char *buf)
 void
 i915_perf_load_test_config_cflgt3(struct drm_i915_private *dev_priv)
 {
-	strncpy(dev_priv->perf.oa.test_config.uuid,
+	strlcpy(dev_priv->perf.oa.test_config.uuid,
 		"577e8e2c-3fa0-4875-8743-3538d585e3b0",
-		UUID_STRING_LEN);
+		sizeof(dev_priv->perf.oa.test_config.uuid));
 	dev_priv->perf.oa.test_config.id = 1;
 
 	dev_priv->perf.oa.test_config.mux_regs = mux_config_test_oa;
--
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