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Commit 77e80588 authored by Martin Sperl's avatar Martin Sperl Committed by Mark Brown
Browse files

spi: bugfix: spi_message.transfer_length does not get reset 



When submitting an identical spi_message multiple times via spi_sync
the spi_message.frame_length does not get reset to 0 in __spi_validate
before adding up all spi_transfer.len resulting in
frame_length > actual_length on all but the first spi_sync call.

Signed-off-by: default avatarMartin Sperl <kernel@martin.sperl.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 8005c49d

drivers/spi/spi.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -2130,6 +2130,7 @@ static int __spi_validate(struct spi_device *spi, struct spi_message *message) 
	 * Set transfer tx_nbits and rx_nbits as single transfer default

	 * Set transfer tx_nbits and rx_nbits as single transfer default

	 * (SPI_NBITS_SINGLE) if it is not set for this transfer.

	 * (SPI_NBITS_SINGLE) if it is not set for this transfer.

	 */

	 */

	message->frame_length = 0;

	list_for_each_entry(xfer, &message->transfers, transfer_list) {

	list_for_each_entry(xfer, &message->transfers, transfer_list) {

		message->frame_length += xfer->len;

		message->frame_length += xfer->len;

		if (!xfer->bits_per_word)

		if (!xfer->bits_per_word)