Artur Rojek 196f6c7190 sh: dma: Fix DMA channel offset calculation ... [ Upstream commit e82e475848 ] Various SoCs of the SH3, SH4 and SH4A family, which use this driver, feature a differing number of DMA channels, which can be distributed between up to two DMAC modules. The existing implementation fails to correctly accommodate for all those variations, resulting in wrong channel offset calculations and leading to kernel panics. Rewrite dma_base_addr() in order to properly calculate channel offsets in a DMAC module. Fix dmaor_read_reg() and dmaor_write_reg(), so that the correct DMAC module base is selected for the DMAOR register. Fixes: 7f47c7189b ("sh: dma: More legacy cpu dma chainsawing.") Signed-off-by: Artur Rojek <contact@artur-rojek.eu> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Link: https://lore.kernel.org/r/20230527164452.64797-2-contact@artur-rojek.eu Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-07-23 13:47:30 +02:00
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dma	sh: dma: Fix DMA channel offset calculation	2023-07-23 13:47:30 +02:00
pci	dma-mapping: remove the dma_direct_set_offset export	2020-11-18 09:11:38 +01:00
superhyway	sh: drivers: convert to SPDX identifiers	2018-12-28 12:11:44 -08:00
Kconfig	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Makefile	drivers: move the early platform device support to arch/sh	2019-10-07 13:50:47 +02:00
heartbeat.c	remove ioremap_nocache and devm_ioremap_nocache	2020-01-06 09:45:59 +01:00
platform_early.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
push-switch.c	sh: drivers: convert to SPDX identifiers	2018-12-28 12:11:44 -08:00