diff options
| author | Artur Rojek <[email protected]> | 2023-05-27 18:44:50 +0200 |
|---|---|---|
| committer | John Paul Adrian Glaubitz <[email protected]> | 2023-07-05 18:55:25 +0200 |
| commit | e82e47584847129a20b8c9f4a1dcde09374fb0e0 (patch) | |
| tree | 94ad71d8fb0ea00b793e9d8b0f938ae597da5ded /lib/test_fortify/write_overflow-strlcpy-src.c | |
| parent | 4bd04b2037423f11e6be03709d1fccdc6045c4a1 (diff) | |
sh: dma: Fix DMA channel offset calculation
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: 7f47c7189b3e8f19 ("sh: dma: More legacy cpu dma chainsawing.")
Signed-off-by: Artur Rojek <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: John Paul Adrian Glaubitz <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: John Paul Adrian Glaubitz <[email protected]>
Diffstat (limited to 'lib/test_fortify/write_overflow-strlcpy-src.c')
0 files changed, 0 insertions, 0 deletions