diff options
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 299384c91917..8158e281f354 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1023,7 +1023,8 @@ static int spi_map_msg(struct spi_controller *ctlr, struct spi_message *msg) void *tmp; unsigned int max_tx, max_rx; - if (ctlr->flags & (SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX)) { + if ((ctlr->flags & (SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX)) + && !(msg->spi->mode & SPI_3WIRE)) { max_tx = 0; max_rx = 0; @@ -1075,7 +1076,7 @@ static int spi_transfer_wait(struct spi_controller *ctlr, { struct spi_statistics *statm = &ctlr->statistics; struct spi_statistics *stats = &msg->spi->statistics; - unsigned long long ms = 1; + unsigned long long ms; if (spi_controller_is_slave(ctlr)) { if (wait_for_completion_interruptible(&ctlr->xfer_completion)) { @@ -1160,6 +1161,8 @@ int spi_delay_exec(struct spi_delay *_delay, struct spi_transfer *xfer) { int delay; + might_sleep(); + if (!_delay) return -EINVAL; @@ -3855,8 +3858,7 @@ static u8 *buf; * is zero for success, else a negative errno status code. * This call may only be used from a context that may sleep. * - * Parameters to this routine are always copied using a small buffer; - * portable code should never use this for more than 32 bytes. + * Parameters to this routine are always copied using a small buffer. * Performance-sensitive or bulk transfer code should instead use * spi_{async,sync}() calls with dma-safe buffers. * |