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Date: Sun, 09 Dec 2018 21:50:33 +0000 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org CC: akpm@...ux-foundation.org, "Hiromitsu Yamasaki" <hiromitsu.yamasaki.ym@...esas.com>, "Geert Uytterhoeven" <geert+renesas@...der.be>, "Mark Brown" <broonie@...nel.org> Subject: [PATCH 3.16 201/328] spi: sh-msiof: Fix handling of write value for SISTR register 3.16.62-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@...esas.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@...esas.com> [geert: reword] Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be> Signed-off-by: Mark Brown <broonie@...nel.org> Signed-off-by: Ben Hutchings <ben@...adent.org.uk> --- 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 @@ -325,7 +325,8 @@ 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,
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