spi: spi-mem: Fix spi_mem_poll_status()

In spi_mem_exec_op(), in case cs_gpiod descriptor is set, exec_op()
callback can't be used.
The same must be applied in spi_mem_poll_status(), poll_status()
callback can't be used, we must use the legacy path using
read_poll_timeout().

Tested on STM32mp257c-ev1 specific evaluation board on which a
spi-nand was mounted instead of a spi-nor.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Tested-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20220602091022.358127-1-patrice.chotard@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index e8de4f5017cdc5cb2566a3479970f3d9e5f73c7b..0c79193d969720f628f344e971697cbbb83285d7 100644 (file)
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -808,7 +808,7 @@ int spi_mem_poll_status(struct spi_mem *mem,
            op->data.dir != SPI_MEM_DATA_IN)
                return -EINVAL;
 
-       if (ctlr->mem_ops && ctlr->mem_ops->poll_status) {
+       if (ctlr->mem_ops && ctlr->mem_ops->poll_status && !mem->spi->cs_gpiod) {
                ret = spi_mem_access_start(mem);
                if (ret)
                        return ret;