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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>
This commit is contained in:
channing 2013-01-22 16:08:46 +08:00 committed by Greg Kroah-Hartman
parent 666b7793d4
commit aea95548c0
1 changed files with 0 additions and 1 deletions
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drivers/tty/serial/ifx6x60.c
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@ -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;