Hello Alex Deucher,
This is a semi-automatic email about new static checker warnings.
The patch d38ceaf99ed0: "drm/amdgpu: add core driver (v4)" from Apr 20, 2015, leads to the following Smatch complaint:
drivers/gpu/drm/amd/amdgpu/atombios_i2c.c:68 amdgpu_atombios_i2c_process_i2c_ch() error: we previously assumed 'buf' could be null (see line 61)
drivers/gpu/drm/amd/amdgpu/atombios_i2c.c 60 } 61 if (buf == NULL) ^^^^^^^^^^^ Check.
62 args.ucRegIndex = 0; 63 else 64 args.ucRegIndex = buf[0]; 65 if (num) 66 num--; 67 if (num) 68 memcpy(&out, &buf[1], num); ^^^^^ Not checked. It's possible it was intended to set "num" ot zero instead of args.ucRegIndex? Also memcpy() with a size zero is a no-op so the if statement could be removed if you want.
69 args.lpI2CDataOut = cpu_to_le16(out); 70 } else {
regards, dan carpenter