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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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26f0739936
When submitting a DMA request fails in sci_dma_rx_complete(), the driver
tries to fall back to PIO, but that does not work: no more data will be
received, or the kernel will even crash.
Fix this similar as in (but not identical to) sci_submit_rx():
- On SCIF, PIO cannot take over if any DMA transactions are pending,
hence they must be terminated first.
- All active cookies must be invalidated, else rx_timer_fn() may
trigger a NULL pointer dereference.
- Restarting the port is not needed, as it is already running, but
serial port interrupts must be directed back from the DMA engine to
the CPU.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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|---|---|---|
| .. | ||
| 8250 | ||
| cpm_uart | ||
| jsm | ||
| 21285.c | ||
| altera_jtaguart.c | ||
| altera_uart.c | ||
| amba-pl010.c | ||
| amba-pl011.c | ||
| amba-pl011.h | ||
| apbuart.c | ||
| apbuart.h | ||
| ar933x_uart.c | ||
| arc_uart.c | ||
| atmel_serial.c | ||
| atmel_serial.h | ||
| bcm63xx_uart.c | ||
| clps711x.c | ||
| digicolor-usart.c | ||
| dz.c | ||
| dz.h | ||
| earlycon-arm-semihost.c | ||
| earlycon.c | ||
| efm32-uart.c | ||
| fsl_lpuart.c | ||
| icom.c | ||
| icom.h | ||
| ifx6x60.c | ||
| ifx6x60.h | ||
| imx.c | ||
| ioc3_serial.c | ||
| ioc4_serial.c | ||
| ip22zilog.c | ||
| ip22zilog.h | ||
| Kconfig | ||
| kgdb_nmi.c | ||
| kgdboc.c | ||
| lantiq.c | ||
| lpc32xx_hs.c | ||
| Makefile | ||
| max310x.c | ||
| max3100.c | ||
| mcf.c | ||
| men_z135_uart.c | ||
| meson_uart.c | ||
| mpc52xx_uart.c | ||
| mps2-uart.c | ||
| mpsc.c | ||
| msm_serial.c | ||
| mux.c | ||
| mvebu-uart.c | ||
| mxs-auart.c | ||
| netx-serial.c | ||
| omap-serial.c | ||
| owl-uart.c | ||
| pch_uart.c | ||
| pic32_uart.c | ||
| pic32_uart.h | ||
| pmac_zilog.c | ||
| pmac_zilog.h | ||
| pnx8xxx_uart.c | ||
| pxa.c | ||
| qcom_geni_serial.c | ||
| rda-uart.c | ||
| rp2.c | ||
| sa1100.c | ||
| samsung.c | ||
| samsung.h | ||
| sb1250-duart.c | ||
| sc16is7xx.c | ||
| sccnxp.c | ||
| serial_core.c | ||
| serial_ks8695.c | ||
| serial_mctrl_gpio.c | ||
| serial_mctrl_gpio.h | ||
| serial_txx9.c | ||
| serial-tegra.c | ||
| sh-sci.c | ||
| sh-sci.h | ||
| sirfsoc_uart.c | ||
| sirfsoc_uart.h | ||
| sn_console.c | ||
| sprd_serial.c | ||
| st-asc.c | ||
| stm32-usart.c | ||
| stm32-usart.h | ||
| suncore.c | ||
| sunhv.c | ||
| sunsab.c | ||
| sunsab.h | ||
| sunsu.c | ||
| sunzilog.c | ||
| sunzilog.h | ||
| timbuart.c | ||
| timbuart.h | ||
| uartlite.c | ||
| ucc_uart.c | ||
| vr41xx_siu.c | ||
| vt8500_serial.c | ||
| xilinx_uartps.c | ||
| zs.c | ||
| zs.h | ||