On Tue, Mar 31, 2020 at 8:38 PM Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote: > > It's currently the platform driver's responsibility to initialize the > pointer, dma_parms, for its corresponding struct device. The benefit with > this approach allows us to avoid the initialization and to not waste memory > for the struct device_dma_parameters, as this can be decided on a case by > case basis. > > However, it has turned out that this approach is not very practical. Not > only does it lead to open coding, but also to real errors. In principle > callers of dma_set_max_seg_size() doesn't check the error code, but just > assumes it succeeds. > > For these reasons, let's do the initialization from the common platform bus > at the device registration point. This also follows the way the PCI devices > are being managed, see pci_device_add(). > > Suggested-by: Christoph Hellwig <hch@xxxxxx> > Cc: <stable@xxxxxxxxxxxxxxx> > Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx>
