Messages in this thread Patch in this message | | | Subject | pcmcia/serial release of memory I/O twice | From | Jose Alonso <> | Date | Tue, 09 Mar 2004 13:09:10 -0300 |
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I am using a pcmcia modem (linux-2.6.3) and when I unplug the card the kernel warns: "kernel: Trying to free nonexistent resource <000003e8-000003ef>"
The allocation of I/O address is done in: module serial_cs: simple_config: pcmcia_request_io ---> allocate I/O address setup_serial ... serial8250_request_port ---> doesn't allocate I/O (UPF_RESOURCES is not set)
The release of I/O address is done in: module serial_cs: serial_remove: unregister_serial ... serial8250_release_port ---> release I/O pcmcia_release_io ---> release again the I/O
I suggest the patch bellow:
--- drivers/serial/8250.c.ORIG 2004-02-18 00:57:14.000000000 -0300 +++ drivers/serial/8250.c 2004-02-27 13:31:41.000000000 -0300 @@ -1670,6 +1670,8 @@ struct uart_8250_port *up = (struct uart_8250_port *)port; unsigned long start, offset = 0, size = 0; + if (!(up->port.flags & UPF_RESOURCES)) + return; if (up->port.type == PORT_RSA) { offset = UART_RSA_BASE << up->port.regshift; size = 8; -- alonso
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