On Mon, May 04, 2020 at 10:59:29AM +0200, Nicolas Saenz Julienne wrote: > On Sat, 2020-05-02 at 11:05 +0200, Stefan Wahren wrote: > > > + pci_read_config_dword(pdev, VL805_PCI_CONFIG_VERSION_OFFSET, &version); > > pci_read_config_dword() can fail, we might want to store the return value? > > I planned on doing that, but realised that the vast majority of > pci_read_config_*() users pass on checking for errors. > > Bjorn, any rule of thumb on when to check for errors here?
Not really. It *can* fail, for sure. If it does fail, you normally get ~0 data, which means you would skip the firmware load, do another config read (which probably also returns ~0) and print firmware version ffffffff, and the device probably won't work. But checking doesn't get you much other than a better error message. Personally I probably wouldn't bother because it clutters the code so much for so little benefit. Bjorn
