From: Andrey Pronin <[email protected]>

Reject burstcounts larger than 64 bytes reported by tpm.
SPI Hardware Protocol defined in section 6.4 of TCG PTP
Spec supports up to 64 bytes of data in a transaction.

Signed-off-by: Andrey Pronin <[email protected]>
Reviewed-by: Dmitry Torokhov <[email protected]>
Reviewed-by: Jarkko Sakkinen <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>
---

This is a resend of 
https://lkml.kernel.org/r/[email protected]

 drivers/char/tpm/tpm_tis_spi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/char/tpm/tpm_tis_spi.c b/drivers/char/tpm/tpm_tis_spi.c
index 9914f6973463..0fdd3966a3b3 100644
--- a/drivers/char/tpm/tpm_tis_spi.c
+++ b/drivers/char/tpm/tpm_tis_spi.c
@@ -194,6 +194,7 @@ static const struct tpm_tis_phy_ops tpm_spi_phy_ops = {
        .read16 = tpm_tis_spi_read16,
        .read32 = tpm_tis_spi_read32,
        .write32 = tpm_tis_spi_write32,
+       .max_xfer_size = MAX_SPI_FRAMESIZE,
 };
 
 static int tpm_tis_spi_probe(struct spi_device *dev)
-- 
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