diff options
author | Chanho Park <chanho61.park@samsung.com> | 2022-06-27 09:51:13 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-21 22:20:18 +0300 |
commit | 5450430199e319446d6b7a0ec963e3c951b121ab (patch) | |
tree | 762ccd9c200509b6aa57cb5db5c0959daffbc11e /drivers | |
parent | 0e5668ed7b7aaab4a53126daeef0258c5c573d5d (diff) | |
download | linux-5450430199e319446d6b7a0ec963e3c951b121ab.tar.xz |
tty: serial: samsung_tty: set dma burst_size to 1
commit f7e35e4bf1e8dc2c8cbd5e0955dc1bd58558dae0 upstream.
The src_maxburst and dst_maxburst have been changed to 1 but the settings
of the UCON register aren't changed yet. They should be changed as well
according to the dmaengine slave config.
Fixes: aa2f80e752c7 ("serial: samsung: fix maxburst parameter for DMA transactions")
Cc: stable <stable@kernel.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
Link: https://lore.kernel.org/r/20220627065113.139520-1-chanho61.park@samsung.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/tty/serial/samsung_tty.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c index 81faead3c4f8..263c33260d8a 100644 --- a/drivers/tty/serial/samsung_tty.c +++ b/drivers/tty/serial/samsung_tty.c @@ -361,8 +361,7 @@ static void enable_tx_dma(struct s3c24xx_uart_port *ourport) /* Enable tx dma mode */ ucon = rd_regl(port, S3C2410_UCON); ucon &= ~(S3C64XX_UCON_TXBURST_MASK | S3C64XX_UCON_TXMODE_MASK); - ucon |= (dma_get_cache_alignment() >= 16) ? - S3C64XX_UCON_TXBURST_16 : S3C64XX_UCON_TXBURST_1; + ucon |= S3C64XX_UCON_TXBURST_1; ucon |= S3C64XX_UCON_TXMODE_DMA; wr_regl(port, S3C2410_UCON, ucon); @@ -634,7 +633,7 @@ static void enable_rx_dma(struct s3c24xx_uart_port *ourport) S3C64XX_UCON_DMASUS_EN | S3C64XX_UCON_TIMEOUT_EN | S3C64XX_UCON_RXMODE_MASK); - ucon |= S3C64XX_UCON_RXBURST_16 | + ucon |= S3C64XX_UCON_RXBURST_1 | 0xf << S3C64XX_UCON_TIMEOUT_SHIFT | S3C64XX_UCON_EMPTYINT_EN | S3C64XX_UCON_TIMEOUT_EN | |