4.19-stable review patch. If anyone has any objections, please let me know.
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From: Everest K.C everestkc@everestkc.com.np
[ Upstream commit 53d91ca76b6c426c546542a44c78507b42008c9e ]
The while loop breaks in the first run because of incorrect if condition. It also causes the statements after the if to appear dead. Fix this by changing the condition from if(timeout--) to if(!timeout--).
This bug was reported by Coverity Scan. Report: CID 1600859: (#1 of 1): Logically dead code (DEADCODE) dead_error_line: Execution cannot reach this statement: udelay(30UL);
Fixes: 9e2c7d99941d ("crypto: cavium - Add Support for Octeon-tx CPT Engine") Signed-off-by: Everest K.C. everestkc@everestkc.com.np Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/cavium/cpt/cptpf_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/cavium/cpt/cptpf_main.c b/drivers/crypto/cavium/cpt/cptpf_main.c index 7416f30ee976d..7e1d95b85b270 100644 --- a/drivers/crypto/cavium/cpt/cptpf_main.c +++ b/drivers/crypto/cavium/cpt/cptpf_main.c @@ -48,7 +48,7 @@ static void cpt_disable_cores(struct cpt_device *cpt, u64 coremask, dev_err(dev, "Cores still busy %llx", coremask); grp = cpt_read_csr64(cpt->reg_base, CPTX_PF_EXEC_BUSY(0)); - if (timeout--) + if (!timeout--) break;
udelay(CSR_DELAY); @@ -398,7 +398,7 @@ static void cpt_disable_all_cores(struct cpt_device *cpt) dev_err(dev, "Cores still busy"); grp = cpt_read_csr64(cpt->reg_base, CPTX_PF_EXEC_BUSY(0)); - if (timeout--) + if (!timeout--) break;
udelay(CSR_DELAY);