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c31bbc140b
The driver was originally written with the assumption that a different API must be used for DMA-related functions if the device is PCIe based or if not. Since Xillybus' driver supports devices on a PCIe bus (with xillybus_pcie) as well as connected directly to the processor (with xillybus_of), it originally used wrapper functions that ensure that a different API is used for each. This patch eliminates the said wrapper functions, as all use the same dma_* API now. This is most notable by the code deleted in xillybus_pcie.c and xillybus_of.c. It also eliminates the OF driver's check for a "dma-coherent" attribute in the device's OF entry, since this is taken care of by the kernel's implementation of dma_sync_single_for_*(). There is however still need for one wrapper function, which is merged from xillybus_pcie.c and xillybus_of.c into xillybus_core.c: The call to dma_map_single() is wrapped by a function that uses the Managed Device (devres) framework, in the absence of a relevant function in the current kernel's API. Suggested-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Suggested-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Eli Billauer <eli.billauer@gmail.com> Link: https://lore.kernel.org/r/20210929094442.46383-1-eli.billauer@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>