4.4-stable review patch. If anyone has any objections, please let me know.
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From: Hiromitsu Yamasaki hiromitsu.yamasaki.ym@renesas.com
commit 31a5fae4c5a009898da6d177901d5328051641ff upstream.
This patch changes writing to the SISTR register according to the H/W user's manual.
The TDREQ bit and RDREQ bits of SISTR are read-only, and must be written their initial values of zero.
Signed-off-by: Hiromitsu Yamasaki hiromitsu.yamasaki.ym@renesas.com [geert: reword] Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Signed-off-by: Mark Brown broonie@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/spi/spi-sh-msiof.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -374,7 +374,8 @@ static void sh_msiof_spi_set_mode_regs(s
static void sh_msiof_reset_str(struct sh_msiof_spi_priv *p) { - sh_msiof_write(p, STR, sh_msiof_read(p, STR)); + sh_msiof_write(p, STR, + sh_msiof_read(p, STR) & ~(STR_TDREQ | STR_RDREQ)); }
static void sh_msiof_spi_write_fifo_8(struct sh_msiof_spi_priv *p,