linux-kernel - [PATCH 2/2] spi: fsl: remove is_dma

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240328-spi-more-tx-rx-buf-cleanup-v1-2-9ec1ceedf08c@baylibre.com>
Date: Thu, 28 Mar 2024 15:51:46 -0500
From: David Lechner <dlechner@...libre.com>
To: Mark Brown <broonie@...nel.org>
Cc: David Lechner <dlechner@...libre.com>,
	linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] spi: fsl: remove is_dma_mapped checks

There are no more peripheral drivers that set t->tx_dma or t->rx_dma.
Therefore, is_dma_mapped is always false and can be removed.

Signed-off-by: David Lechner <dlechner@...libre.com>
---
 drivers/spi/spi-fsl-cpm.c | 14 ++++----------
 drivers/spi/spi-fsl-cpm.h |  5 ++---
 drivers/spi/spi-fsl-spi.c |  7 +++----
 3 files changed, 9 insertions(+), 17 deletions(-)

diff --git a/drivers/spi/spi-fsl-cpm.c b/drivers/spi/spi-fsl-cpm.c
index 47c7a5c6257f..e335132080bf 100644
--- a/drivers/spi/spi-fsl-cpm.c
+++ b/drivers/spi/spi-fsl-cpm.c
@@ -98,19 +98,13 @@ static void fsl_spi_cpm_bufs_start(struct mpc8xxx_spi *mspi)
 	mpc8xxx_spi_write_reg(&reg_base->command, SPCOM_STR);
 }
 
-int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
-		     struct spi_transfer *t, bool is_dma_mapped)
+int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi, struct spi_transfer *t)
 {
 	struct device *dev = mspi->dev;
 	struct fsl_spi_reg __iomem *reg_base = mspi->reg_base;
 
-	if (is_dma_mapped) {
-		mspi->map_tx_dma = 0;
-		mspi->map_rx_dma = 0;
-	} else {
-		mspi->map_tx_dma = 1;
-		mspi->map_rx_dma = 1;
-	}
+	mspi->map_tx_dma = 1;
+	mspi->map_rx_dma = 1;
 
 	if (!t->tx_buf) {
 		mspi->tx_dma = mspi->dma_dummy_tx;
@@ -147,7 +141,7 @@ int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
 			return -ENOMEM;
 		}
 	} else if (t->tx_buf) {
-		mspi->tx_dma = t->tx_dma;
+		mspi->tx_dma = 0;
 	}
 
 	if (mspi->map_rx_dma) {
diff --git a/drivers/spi/spi-fsl-cpm.h b/drivers/spi/spi-fsl-cpm.h
index 160f999708b6..e012abba055f 100644
--- a/drivers/spi/spi-fsl-cpm.h
+++ b/drivers/spi/spi-fsl-cpm.h
@@ -20,7 +20,7 @@
 #ifdef CONFIG_FSL_SOC
 extern void fsl_spi_cpm_reinit_txrx(struct mpc8xxx_spi *mspi);
 extern int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
-			    struct spi_transfer *t, bool is_dma_mapped);
+			    struct spi_transfer *t);
 extern void fsl_spi_cpm_bufs_complete(struct mpc8xxx_spi *mspi);
 extern void fsl_spi_cpm_irq(struct mpc8xxx_spi *mspi, u32 events);
 extern int fsl_spi_cpm_init(struct mpc8xxx_spi *mspi);
@@ -28,8 +28,7 @@ extern void fsl_spi_cpm_free(struct mpc8xxx_spi *mspi);
 #else
 static inline void fsl_spi_cpm_reinit_txrx(struct mpc8xxx_spi *mspi) { }
 static inline int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
-				   struct spi_transfer *t,
-				   bool is_dma_mapped) { return 0; }
+				   struct spi_transfer *t) { return 0; }
 static inline void fsl_spi_cpm_bufs_complete(struct mpc8xxx_spi *mspi) { }
 static inline void fsl_spi_cpm_irq(struct mpc8xxx_spi *mspi, u32 events) { }
 static inline int fsl_spi_cpm_init(struct mpc8xxx_spi *mspi) { return 0; }
diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index 97faf984801f..997e07c0a24a 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -249,8 +249,7 @@ static int fsl_spi_cpu_bufs(struct mpc8xxx_spi *mspi,
 	return 0;
 }
 
-static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t,
-			    bool is_dma_mapped)
+static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t)
 {
 	struct mpc8xxx_spi *mpc8xxx_spi = spi_controller_get_devdata(spi->controller);
 	struct fsl_spi_reg __iomem *reg_base;
@@ -274,7 +273,7 @@ static int fsl_spi_bufs(struct spi_device *spi, struct spi_transfer *t,
 	reinit_completion(&mpc8xxx_spi->done);
 
 	if (mpc8xxx_spi->flags & SPI_CPM_MODE)
-		ret = fsl_spi_cpm_bufs(mpc8xxx_spi, t, is_dma_mapped);
+		ret = fsl_spi_cpm_bufs(mpc8xxx_spi, t);
 	else
 		ret = fsl_spi_cpu_bufs(mpc8xxx_spi, t, len);
 	if (ret)
@@ -353,7 +352,7 @@ static int fsl_spi_transfer_one(struct spi_controller *controller,
 	if (status < 0)
 		return status;
 	if (t->len)
-		status = fsl_spi_bufs(spi, t, !!t->tx_dma || !!t->rx_dma);
+		status = fsl_spi_bufs(spi, t);
 	if (status > 0)
 		return -EMSGSIZE;
 

-- 
2.43.2