From f165ed63370cfcc3a459cbd855822559f375a538 Mon Sep 17 00:00:00 2001 From: Sifan Naeem Date: Mon, 2 Mar 2015 16:06:46 +0000 Subject: [PATCH] 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 Reviewed-by: Andrew Bresticker Signed-off-by: Mark Brown --- drivers/spi/spi-img-spfi.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c index c01567d..e649bc7 100644 --- a/drivers/spi/spi-img-spfi.c +++ b/drivers/spi/spi-img-spfi.c @@ -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. -- 2.7.4