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| author | Matthias Schiffer <matthias.schiffer@ew.tq-group.com> | 2022-04-06 15:28:32 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-04-13 14:43:58 +0100 |
| commit | f1d388f216aeb41a5df518815ae559d14a6d438e (patch) | |
| tree | 4ea7ea27c0496898ad52b036432e172c66c951c1 /include/linux/fpga/fpga-region.h | |
| parent | 299d8b74519d04042f8803d0604e08a1a7e31e5e (diff) | |
spi: cadence-quadspi: fix incorrect supports_op() return value
Since the conversion to spi-mem, the driver advertised support for
various operations that cqspi_set_protocol() was never expected to handle
correctly - in particuar all non-DTR operations with command or address
buswidth > 1. For DTR, all operations except for 8-8-8 would fail, as
cqspi_set_protocol() returns -EINVAL.
In non-DTR mode, this resulted in data corruption for SPI-NOR flashes that
support such operations. As a minimal fix that can be backported to stable
kernels, simply disallow the unsupported operations again to avoid this
issue.
Fixes: a314f6367787 ("mtd: spi-nor: Convert cadence-quadspi to use spi-mem framework")
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Link: https://lore.kernel.org/r/20220406132832.199777-1-matthias.schiffer@ew.tq-group.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/fpga/fpga-region.h')
0 files changed, 0 insertions, 0 deletions