The patch titled atmel_spi: support zero length transfer has been removed from the -mm tree. Its filename was atmel_spi-support-zero-length-transfer.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: atmel_spi: support zero length transfer From: Atsushi Nemoto <anemo@xxxxxxxxxxxxx> A spi transfer with zero length is not invalid. For example, such transfer (len == 0 && delay_usecs != 0) can be used to achieve delay before first CLK edge after chipselect assertion. Signed-off-by: Atsushi Nemoto <anemo@xxxxxxxxxxxxx> Cc: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx> Cc: David Brownell <david-b@xxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/spi/atmel_spi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN drivers/spi/atmel_spi.c~atmel_spi-support-zero-length-transfer drivers/spi/atmel_spi.c --- a/drivers/spi/atmel_spi.c~atmel_spi-support-zero-length-transfer +++ a/drivers/spi/atmel_spi.c @@ -616,7 +616,7 @@ static int atmel_spi_transfer(struct spi return -ESHUTDOWN; list_for_each_entry(xfer, &msg->transfers, transfer_list) { - if (!(xfer->tx_buf || xfer->rx_buf)) { + if (!(xfer->tx_buf || xfer->rx_buf) && xfer->len) { dev_dbg(&spi->dev, "missing rx or tx buf\n"); return -EINVAL; } _ Patches currently in -mm which might be from anemo@xxxxxxxxxxxxx are origin.patch git-mips.patch git-mtd.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html