linux-kernel - [PATCH] gpu: drm: radeon: cik: Replace mdelay() with msleep() in cik_pcie_gen3

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Date:   Sat,  4 Aug 2018 08:25:35 +0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     alexander.deucher@....com, christian.koenig@....com,
        David1.Zhou@....com, airlied@...ux.ie
Cc:     amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] gpu: drm: radeon: cik: Replace mdelay() with msleep() in cik_pcie_gen3_enable()

cik_pcie_gen3_enable() is never called in atomic context.
It calls mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep().

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 drivers/gpu/drm/radeon/cik.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
index 7c73bc7e2f85..c1b4d4fbcf3a 100644
--- a/drivers/gpu/drm/radeon/cik.c
+++ b/drivers/gpu/drm/radeon/cik.c
@@ -9598,7 +9598,7 @@ static void cik_pcie_gen3_enable(struct radeon_device *rdev)
 				tmp |= LC_REDO_EQ;
 				WREG32_PCIE_PORT(PCIE_LC_CNTL4, tmp);
 
-				mdelay(100);
+				msleep(100);
 
 				/* linkctl */
 				pci_read_config_word(root, bridge_pos + PCI_EXP_LNKCTL, &tmp16);
-- 
2.17.0