[PATCH AUTOSEL 5.9 057/111] habanalabs: cast to u64 before shift > 31 bits

Sasha Levin
2020-10-18T19:19:24Z

From: Oded Gabbay <oded.gabbay@gmail.com>

[ Upstream commit f763946aefe67b3ea58696b75a930ba1ed886a83 ]

When shifting a boolean variable by more than 31 bits and putting the
result into a u64 variable, we need to cast the boolean into unsigned 64
bits to prevent possible overflow.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/misc/habanalabs/gaudi/gaudi.c | 8 +++++---
drivers/misc/habanalabs/goya/goya.c | 8 +++++---
2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 4009b7df4cafe..2e55890ad6a61 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -6099,7 +6099,7 @@ static bool gaudi_is_device_idle(struct hl_device *hdev, u32 *mask,
is_idle &= is_eng_idle;

if (mask)
- *mask |= !is_eng_idle <<
+ *mask |= ((u64) !is_eng_idle) <<
(GAUDI_ENGINE_ID_DMA_0 + dma_id);
if (s)
seq_printf(s, fmt, dma_id,
@@ -6122,7 +6122,8 @@ static bool gaudi_is_device_idle(struct hl_device *hdev, u32 *mask,
is_idle &= is_eng_idle;

if (mask)
- *mask |= !is_eng_idle << (GAUDI_ENGINE_ID_TPC_0 + i);
+ *mask |= ((u64) !is_eng_idle) <<
+ (GAUDI_ENGINE_ID_TPC_0 + i);
if (s)
seq_printf(s, fmt, i,
is_eng_idle ? "Y" : "N",
@@ -6150,7 +6151,8 @@ static bool gaudi_is_device_idle(struct hl_device *hdev, u32 *mask,
is_idle &= is_eng_idle;

if (mask)
- *mask |= !is_eng_idle << (GAUDI_ENGINE_ID_MME_0 + i);
+ *mask |= ((u64) !is_eng_idle) <<
+ (GAUDI_ENGINE_ID_MME_0 + i);
if (s) {
if (!is_slave)
seq_printf(s, fmt, i,
diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
index 33cd2ae653d23..c09742f440f96 100644
--- a/drivers/misc/habanalabs/goya/goya.c
+++ b/drivers/misc/habanalabs/goya/goya.c
@@ -5166,7 +5166,8 @@ static bool goya_is_device_idle(struct hl_device *hdev, u32 *mask,
is_idle &= is_eng_idle;

if (mask)
- *mask |= !is_eng_idle << (GOYA_ENGINE_ID_DMA_0 + i);
+ *mask |= ((u64) !is_eng_idle) <<
+ (GOYA_ENGINE_ID_DMA_0 + i);
if (s)
seq_printf(s, dma_fmt, i, is_eng_idle ? "Y" : "N",
qm_glbl_sts0, dma_core_sts0);
@@ -5189,7 +5190,8 @@ static bool goya_is_device_idle(struct hl_device *hdev, u32 *mask,
is_idle &= is_eng_idle;

if (mask)
- *mask |= !is_eng_idle << (GOYA_ENGINE_ID_TPC_0 + i);
+ *mask |= ((u64) !is_eng_idle) <<
+ (GOYA_ENGINE_ID_TPC_0 + i);
if (s)
seq_printf(s, fmt, i, is_eng_idle ? "Y" : "N",
qm_glbl_sts0, cmdq_glbl_sts0, tpc_cfg_sts);
@@ -5209,7 +5211,7 @@ static bool goya_is_device_idle(struct hl_device *hdev, u32 *mask,
is_idle &= is_eng_idle;

if (mask)
- *mask |= !is_eng_idle << GOYA_ENGINE_ID_MME_0;
+ *mask |= ((u64) !is_eng_idle) << GOYA_ENGINE_ID_MME_0;
if (s) {
seq_printf(s, fmt, 0, is_eng_idle ? "Y" : "N", qm_glbl_sts0,
cmdq_glbl_sts0, mme_arch_sts);
--
2.25.1