tree fe9bbe64fa2e0f32b3ac3366d3b0591b63cadc6d
parent d7b8f8e20813f0179d8ef519541a3527e7661d3a
author Cheng Ming Lin <chengminglin@mxic.com.tw> 1752462623 +0800
committer Mark Brown <broonie@kernel.org> 1752500640 +0100
gpgsig -----BEGIN PGP SIGNATURE-----
 
 iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmh1CaAACgkQJNaLcl1U
 h9AagQf/cFrW4dIXDmYe0IEKphR1YDphGxJbJ/KWLXRR0ttyCqIpJ/E10ZPDjbix
 8c86mti/46vdRVG6Y3vVplQPwAaPcK2+fpUXwFSwi+BJIFsaXfvPP/N88oAKAVcY
 bk8BsVhMdV017eY09XxYe8Lizoj7Kf1DpOf6bObefFwi+Nr7ObalzTeVyxmxUgfo
 jROBnnhUspJrpCYHEcjye4l5V92NZbUluhAniGS2t5qSs3DUmlsKbQusZfYQrsQR
 XR/4e20bSj9dIG2ewry+KK11R7vnegFnvO/nyZpSWdc2qBd751vW4g7VPfyfM3sM
 Bh2sPKGttqfy0fMKfyEbgQwXD4WTFQ==
 =P/dR
 -----END PGP SIGNATURE-----

spi: Add check for 8-bit transfer with 8 IO mode support

The current SPI framework does not verify if the SPI device supports
8 IO mode when doing an 8-bit transfer. This patch adds a check to
ensure that if the transfer tx_nbits or rx_nbits is 8, the SPI mode must
support 8 IO. If not, an error is returned, preventing undefined behavior.

Fixes: d6a711a898672 ("spi: Fix OCTAL mode support")
Cc: stable@vger.kernel.org
Signed-off-by: Cheng Ming Lin <chengminglin@mxic.com.tw>
Link: https://patch.msgid.link/20250714031023.504752-1-linchengming884@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>