AuxXxilium/linux_dsm_epyc7002
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Revert "serial: uartps: Do not allow use aliases >= MAX_UART_INSTANCES"

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This reverts commit 2088cfd882.

As Johan says, this driver needs a lot more work and these changes are
only going in the wrong direction:
  https://lkml.kernel.org/r/20190523091839.GC568@localhost

Reported-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/dac3898e3e32d963f357fb436ac9a7ac3cbcf933.1585905873.git.michal.simek@xilinx.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michal Simek 2020-04-03 11:24:33 +02:00 committed by Greg Kroah-Hartman
parent b6fd2dbbd6
commit 91c9dfa25c
1 changed files with 2 additions and 4 deletions
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6
drivers/tty/serial/xilinx_uartps.c
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@ -1712,8 +1712,7 @@ static int cdns_uart_probe(struct platform_device *pdev)
uart_unregister_driver(cdns_uart_data->cdns_uart_driver); uart_unregister_driver(cdns_uart_data->cdns_uart_driver);
err_out_id: err_out_id:
mutex_lock(&bitmap_lock); mutex_lock(&bitmap_lock);
if (cdns_uart_data->id < MAX_UART_INSTANCES) clear_bit(cdns_uart_data->id, bitmap);
clear_bit(cdns_uart_data->id, bitmap);
mutex_unlock(&bitmap_lock); mutex_unlock(&bitmap_lock);
return rc; return rc;
} }
@ -1738,8 +1737,7 @@ static int cdns_uart_remove(struct platform_device *pdev)
rc = uart_remove_one_port(cdns_uart_data->cdns_uart_driver, port); rc = uart_remove_one_port(cdns_uart_data->cdns_uart_driver, port);
port->mapbase = 0; port->mapbase = 0;
mutex_lock(&bitmap_lock); mutex_lock(&bitmap_lock);
if (cdns_uart_data->id < MAX_UART_INSTANCES) clear_bit(cdns_uart_data->id, bitmap);
clear_bit(cdns_uart_data->id, bitmap);
mutex_unlock(&bitmap_lock); mutex_unlock(&bitmap_lock);
clk_disable_unprepare(cdns_uart_data->uartclk); clk_disable_unprepare(cdns_uart_data->uartclk);
clk_disable_unprepare(cdns_uart_data->pclk); clk_disable_unprepare(cdns_uart_data->pclk);