linux-kernel - [PATCH v2 4/7] spi: stm32: Revert "properly handle 0 byte transfer"

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Date:   Wed, 7 Jul 2021 10:27:03 +0200
From:   Alain Volmat <alain.volmat@...s.st.com>
To:     <broonie@...nel.org>, <amelie.delaunay@...s.st.com>
CC:     <mcoquelin.stm32@...il.com>, <alexandre.torgue@...s.st.com>,
        <linux-spi@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <fabrice.gasnier@...s.st.com>,
        <alain.volmat@...s.st.com>
Subject: [PATCH v2 4/7] spi: stm32: Revert "properly handle 0 byte transfer"

0 byte transfer handling is now done within the core in code added
by commit b306320322c9 ("spi: Skip zero-length transfers in spi_transfer_one_message()")

This reverts commit 2269f5a8b1a7 ("spi: stm32: properly handle 0 byte transfer")

Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
---
 drivers/spi/spi-stm32.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 4dbd5cbe0c11..d37bfead4d8c 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -1647,10 +1647,6 @@ static int stm32_spi_transfer_one(struct spi_master *master,
 	struct stm32_spi *spi = spi_master_get_devdata(master);
 	int ret;
 
-	/* Don't do anything on 0 bytes transfers */
-	if (transfer->len == 0)
-		return 0;
-
 	spi->tx_buf = transfer->tx_buf;
 	spi->rx_buf = transfer->rx_buf;
 	spi->tx_len = spi->tx_buf ? transfer->len : 0;
-- 
2.25.1