* [PATCH] serial:ifx6x60: Remove memset for SPI frame
@ 2013-01-22 8:08 channing
0 siblings, 0 replies; only message in thread
From: channing @ 2013-01-22 8:08 UTC (permalink / raw)
To: alan, gregkh; +Cc: jun.d.chen, linux-kernel
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>
---
drivers/tty/serial/ifx6x60.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c
index 8cb6d8d..fa4ec7e 100644
--- 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;
--
1.7.1
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2013-01-22 7:51 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-01-22 8:08 [PATCH] serial:ifx6x60: Remove memset for SPI frame channing
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).