From: Jon Lin <jon.lin@rock-chips.com> To: broonie@kernel.org Cc: heiko@sntech.de, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@esmil.dk, Jon Lin <jon.lin@rock-chips.com> Subject: [PATCH v3 3/3] spi: rockchip: Fix error in SPI slave pio read Date: Thu, 23 Jul 2020 08:43:56 +0800 [thread overview] Message-ID: <20200723004356.6390-3-jon.lin@rock-chips.com> (raw) In-Reply-To: <20200723004356.6390-1-jon.lin@rock-chips.com> The RXFLR is possible larger than rx_left in Rockchip SPI, fix it. Fixes: 01b59ce5dac8 ("spi: rockchip: use irq rather than polling") Signed-off-by: Jon Lin <jon.lin@rock-chips.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Emil Renner Berthing <kernel@esmil.dk> Tested-by: Emil Renner Berthing <kernel@esmil.dk> --- drivers/spi/spi-rockchip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index a451dacab5cf..75a8a9428ff8 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -291,7 +291,7 @@ static void rockchip_spi_pio_writer(struct rockchip_spi *rs) static void rockchip_spi_pio_reader(struct rockchip_spi *rs) { u32 words = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFLR); - u32 rx_left = rs->rx_left - words; + u32 rx_left = (rs->rx_left > words) ? rs->rx_left - words : 0; /* the hardware doesn't allow us to change fifo threshold * level while spi is enabled, so instead make sure to leave -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Jon Lin <jon.lin@rock-chips.com> To: broonie@kernel.org Cc: kernel@esmil.dk, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, linux-rockchip@lists.infradead.org, Jon Lin <jon.lin@rock-chips.com>, linux-arm-kernel@lists.infradead.org, heiko@sntech.de Subject: [PATCH v3 3/3] spi: rockchip: Fix error in SPI slave pio read Date: Thu, 23 Jul 2020 08:43:56 +0800 [thread overview] Message-ID: <20200723004356.6390-3-jon.lin@rock-chips.com> (raw) In-Reply-To: <20200723004356.6390-1-jon.lin@rock-chips.com> The RXFLR is possible larger than rx_left in Rockchip SPI, fix it. Fixes: 01b59ce5dac8 ("spi: rockchip: use irq rather than polling") Signed-off-by: Jon Lin <jon.lin@rock-chips.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Emil Renner Berthing <kernel@esmil.dk> Tested-by: Emil Renner Berthing <kernel@esmil.dk> --- drivers/spi/spi-rockchip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index a451dacab5cf..75a8a9428ff8 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -291,7 +291,7 @@ static void rockchip_spi_pio_writer(struct rockchip_spi *rs) static void rockchip_spi_pio_reader(struct rockchip_spi *rs) { u32 words = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXFLR); - u32 rx_left = rs->rx_left - words; + u32 rx_left = (rs->rx_left > words) ? rs->rx_left - words : 0; /* the hardware doesn't allow us to change fifo threshold * level while spi is enabled, so instead make sure to leave -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-07-23 0:44 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-23 0:43 [PATCH v3 1/3] spi: rockchip: Config spi rx dma burst size depend on xfer length Jon Lin 2020-07-23 0:43 ` Jon Lin 2020-07-23 0:43 ` [PATCH v3 2/3] spi: rockchip: Support 64-location deep FIFOs Jon Lin 2020-07-23 0:43 ` Jon Lin 2020-07-23 0:43 ` Jon Lin 2020-07-23 0:43 ` Jon Lin [this message] 2020-07-23 0:43 ` [PATCH v3 3/3] spi: rockchip: Fix error in SPI slave pio read Jon Lin 2020-07-28 16:31 ` [PATCH v3 1/3] spi: rockchip: Config spi rx dma burst size depend on xfer length Mark Brown 2020-07-28 16:31 ` Mark Brown 2020-07-28 16:31 ` Mark Brown
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