hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

spi/trace: Cap buffer contents at 64 bytes 

Large transfers (64kB) doesn't show up in the trace. Not sure why, but
since printk can only display buffers up to 64 bytes in length, we only
need to store the first 64 bytes.

Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Noralf Trønnes 2019-04-13 22:48:55 +02:00 committed by Mark Brown
parent c9ba7a16d0
commit ed86bf8ef3
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
include/trace/events/spi.h
View File

@ -131,9 +131,11 @@ DECLARE_EVENT_CLASS(spi_transfer,
__field( struct spi_transfer *, xfer )
__field( int, len )
__dynamic_array(u8, rx_buf,
spi_valid_rxbuf(msg, xfer) ? xfer->len : 0)
spi_valid_rxbuf(msg, xfer) ?
(xfer->len < 64 ? xfer->len : 64) : 0)
__dynamic_array(u8, tx_buf,
spi_valid_txbuf(msg, xfer) ? xfer->len : 0)
spi_valid_txbuf(msg, xfer) ?
(xfer->len < 64 ? xfer->len : 64) : 0)
),
TP_fast_assign(
@ -144,11 +146,11 @@ DECLARE_EVENT_CLASS(spi_transfer,
if (spi_valid_txbuf(msg, xfer))
memcpy(__get_dynamic_array(tx_buf),
xfer->tx_buf, xfer->len);
xfer->tx_buf, __get_dynamic_array_len(tx_buf));
if (spi_valid_rxbuf(msg, xfer))
memcpy(__get_dynamic_array(rx_buf),
xfer->rx_buf, xfer->len);
xfer->rx_buf, __get_dynamic_array_len(rx_buf));
),
TP_printk("spi%d.%d %p len=%d tx=[%*phD] rx=[%*phD]",