r100_asic_reset() is never called in atomic context.
It calls mdelay() to busily wait, which is not necessary.
mdelay() can be replaced with msleep() and usleep_range().
This is found by a static analysis tool named DCNS written by myself.
Signed-off-by: Jia-Ju Bai <baijiaju1...@gmail.com>
---
drivers/gpu/drm/radeon/r100.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 7d39ed63e5be..09c418113d9a 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -2576,17 +2576,17 @@ int r100_asic_reset(struct radeon_device *rdev, bool
hard)
S_0000F0_SOFT_RESET_PP(1) |
S_0000F0_SOFT_RESET_RB(1));
RREG32(R_0000F0_RBBM_SOFT_RESET);
- mdelay(500);
+ msleep(500);
WREG32(R_0000F0_RBBM_SOFT_RESET, 0);
- mdelay(1);
+ usleep_range(1000, 2000);
status = RREG32(R_000E40_RBBM_STATUS);
dev_info(rdev->dev, "(%s:%d) RBBM_STATUS=0x%08X\n", __func__, __LINE__,
status);
/* reset CP */
WREG32(R_0000F0_RBBM_SOFT_RESET, S_0000F0_SOFT_RESET_CP(1));
RREG32(R_0000F0_RBBM_SOFT_RESET);
- mdelay(500);
+ msleep(500);
WREG32(R_0000F0_RBBM_SOFT_RESET, 0);
- mdelay(1);
+ usleep_range(1000, 2000);
status = RREG32(R_000E40_RBBM_STATUS);
dev_info(rdev->dev, "(%s:%d) RBBM_STATUS=0x%08X\n", __func__, __LINE__,
status);
/* restore PCI & busmastering */
--
2.17.0
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