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@gmail.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);
On Fri, Aug 3, 2018 at 8:25 PM, Jia-Ju Bai baijiaju1990@gmail.com wrote:
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@gmail.com
Applied. thanks.
Alex
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
dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
dri-devel@lists.freedesktop.org
-
Alex Deucher -
Jia-Ju Bai