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authorNoralf Trønnes <noralf@tronnes.org>2019-04-13 23:48:55 +0300
committerMark Brown <broonie@kernel.org>2019-05-02 04:37:52 +0300
commited86bf8ef3b5ea49230d7d7050a360b74df98ce2 (patch)
tree341520fc2cbbbf06ef66bb425bf3466e8c389da4 /include/trace
parentc9ba7a16d0f1d2b1e70d47296eca5f612c753825 (diff)
downloadlinux-ed86bf8ef3b5ea49230d7d7050a360b74df98ce2.tar.xz
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>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/spi.h10
1 files changed, 6 insertions, 4 deletions
diff --git a/include/trace/events/spi.h b/include/trace/events/spi.h
index aef6869f563d..0dd9171d2ad8 100644
--- a/include/trace/events/spi.h
+++ b/include/trace/events/spi.h
@@ -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]",