Commit f165ed63 authored Mar 02, 2015 by Sifan Naeem Committed by Mark Brown Mar 03, 2015

spi: img-spfi: Verify max spfi transfer length



Maximum transfer length supported by SPFI is 65535, this is limited
by the number of bits available in SPFI TSize register to represent
the transfer size.
For transfer requests larger than the maximum supported the driver
will return an invalid argument error.

Signed-off-by: Sifan Naeem <sifan.naeem@imgtec.com>
Reviewed-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent c517d838

drivers/spi/spi-img-spfi.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -459,6 +459,13 @@ static int img_spfi_transfer_one(struct spi_master *master,
		unsigned long flags;
		int ret;

		if (xfer->len > SPFI_TRANSACTION_TSIZE_MASK) {
		dev_err(spfi->dev,
		"Transfer length (%d) is greater than the max supported (%d)",
		xfer->len, SPFI_TRANSACTION_TSIZE_MASK);
		return -EINVAL;
		}

		/*
		* Stop all DMA and reset the controller if the previous transaction
		* timed-out and never completed it's DMA.