serial:ifx6x60: Remove memset for SPI frame

There is no need to memset 0 to SPI frame memory before preparing
transfer frame bits, because SPI frame header are encoded with valid
data size, so don't need to worry about adopting dirty bits, more,
memset zero for each SPI frame may impact the spi throughput efficiency.

Signed-off-by: Chen Jun <jun.d.chen@intel.com>
Signed-off-by: channing <chao.bi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c
index 6a6668bbb3308549a97b659fa575f1ea5a68334e..f083641bf475429773b2843384bd12261266d9a5 100644 (file)
--- a/drivers/tty/serial/ifx6x60.c
+++ b/drivers/tty/serial/ifx6x60.c
@@ -481,7 +481,6 @@ static int ifx_spi_prepare_tx_buffer(struct ifx_spi_device *ifx_dev)
        unsigned char *tx_buffer;
 
        tx_buffer = ifx_dev->tx_buffer;
-       memset(tx_buffer, 0, IFX_SPI_TRANSFER_SIZE);
 
        /* make room for required SPI header */
        tx_buffer += IFX_SPI_HEADER_OVERHEAD;