lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-Id: <1407977544-2989-1-git-send-email-addy.ke@rock-chips.com> Date: Thu, 14 Aug 2014 08:52:24 +0800 From: Addy Ke <addy.ke@...k-chips.com> To: broonie@...nel.org, heiko@...ech.de, dianders@...omium.org, grant.likely@...aro.org, robh+dt@...nel.org Cc: linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org, olof@...om.net, hj@...k-chips.com, kever.yang@...k-chips.com, xjq@...k-chips.com, huangtao@...k-chips.com, zyw@...k-chips.com, yzq@...k-chips.com, zhenfu.fang@...k-chips.com, cf@...k-chips.com, zhangqing@...k-chips.com, hl@...k-chips.com, wei.luo@...k-chips.com, Addy Ke <addy.ke@...k-chips.com> Subject: [PATCH] spi: rockchip: return 0 if tx_buf and rx_buf are NULL To do so, spi communication can use an empty buf to pull up CS. This patch merged from ChromiumOS tree. Cros_ec use this function to turn off CS and add a delay to ensure the rising edge doesn't come too soon after the end of the data. Tested-by: Doug Anderson <dianders@...omium.org> Signed-off-by: Doug Anderson <dianders@...omium.org> Signed-off-by: Addy Ke <addy.ke@...k-chips.com> --- drivers/spi/spi-rockchip.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index 72fb287..1e3bcfa 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -511,8 +511,8 @@ static int rockchip_spi_transfer_one(struct spi_master *master, WARN_ON((readl_relaxed(rs->regs + ROCKCHIP_SPI_SR) & SR_BUSY)); if (!xfer->tx_buf && !xfer->rx_buf) { - dev_err(rs->dev, "No buffer for transfer\n"); - return -EINVAL; + dev_dbg(rs->dev, "No buffer for transfer\n"); + return 0; } rs->speed = xfer->speed_hz; -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists