linux-kernel - [PATCH AUTOSEL 5.15 03/41] spi: spi-mem: Fix spi_mem_poll

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Message-Id: <20220628022100.595243-3-sashal@kernel.org>
Date:   Mon, 27 Jun 2022 22:20:22 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Patrice Chotard <patrice.chotard@...s.st.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, linux-spi@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 03/41] spi: spi-mem: Fix spi_mem_poll_status()

From: Patrice Chotard <patrice.chotard@...s.st.com>

[ Upstream commit 2283679f4c468df367830b7eb8f22d48a6940e19 ]

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@...s.st.com>
Tested-by: Patrice Chotard <patrice.chotard@...s.st.com>
Link: https://lore.kernel.org/r/20220602091022.358127-1-patrice.chotard@foss.st.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/spi/spi-mem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
index 37f4443ce9a0..96f718634ac7 100644
--- a/drivers/spi/spi-mem.c
+++ b/drivers/spi/spi-mem.c
@@ -795,7 +795,7 @@ 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;
-- 
2.35.1