]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
serial: fsl_lpuart: Reset prior to registration
authorLukas Wunner <lukas@wunner.de>
Sun, 11 Sep 2022 08:22:01 +0000 (10:22 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 22 Sep 2022 14:37:59 +0000 (16:37 +0200)
commit60f361722ad2ae5ee667d0b0545d40c42f754daf
treeb7a226b198aee528b11c555c5f0b1910fe43329b
parent1d10cd4da593bc0196a239dcc54dac24b6b0a74e
serial: fsl_lpuart: Reset prior to registration

Since commit bd5305dcabbc ("tty: serial: fsl_lpuart: do software reset
for imx7ulp and imx8qxp"), certain i.MX UARTs are reset after they've
already been registered.  Register state may thus be clobbered after
user space has begun to open and access the UART.

Avoid by performing the reset prior to registration.

Fixes: bd5305dcabbc ("tty: serial: fsl_lpuart: do software reset for imx7ulp and imx8qxp")
Cc: stable@vger.kernel.org # v5.15+
Cc: Fugang Duan <fugang.duan@nxp.com>
Cc: Sherry Sun <sherry.sun@nxp.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://lore.kernel.org/r/72fb646c1b0b11c989850c55f52f9ff343d1b2fa.1662884345.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serial/fsl_lpuart.c