Hello Pingchao Yang,
The patch b0272276d903: "crypto: qat - add support for new devices to
FW loader" from Dec 4, 2015, leads to the following static checker
warning:
drivers/crypto/qat/qat_common/qat_hal.c:421 qat_hal_check_ae_active()
warn: bitwise AND condition is false here
drivers/crypto/qat/qat_common/qat_hal.c
414 int qat_hal_check_ae_active(struct icp_qat_fw_loader_handle *handle,
415 unsigned int ae)
416 {
417 unsigned int enable = 0, active = 0;
418
419 qat_hal_rd_ae_csr(handle, ae, CTX_ENABLES, &enable);
420 qat_hal_rd_ae_csr(handle, ae, ACTIVE_CTX_STATUS, &active);
421 if ((enable & (0xff >> CE_ENABLE_BITPOS)) ||
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Never true.
CE_ENABLE_BITPOS is 8.
Perhaps the intention was to left shift like we do with ACS_ABO_BITPOS
on the next line?
422 (active & (1 << ACS_ABO_BITPOS)))
423 return 1;
424 else
425 return 0;
426 }
regards,
dan carpenter
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