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[SERIAL] 8250 resourse management fixes 

I think register ranges obviously need to be claimed/released for all UARTs
including those with UPIO_MEM32 and UPIO_TSI iotype.

Also, serial8250_request_rsa_resources() returns false positives with
UPIO_MEM32, UPIO_AU, and UPIO_TSI iotype -- I don't think this makes any sense.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Sergei Shtylyov 2006-09-09 22:23:56 +04:00 committed by Russell King
parent f3d106881b
commit 0b30d668a2
1 changed files with 8 additions and 9 deletions
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17
drivers/serial/8250.c
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@ -1949,6 +1949,8 @@ static int serial8250_request_std_resource(struct uart_8250_port *up)
case UPIO_AU:
size = 0x100000;
/* fall thru */
case UPIO_TSI:
case UPIO_MEM32:
case UPIO_MEM:
if (!up->port.mapbase)
break;
@ -1984,6 +1986,8 @@ static void serial8250_release_std_resource(struct uart_8250_port *up)
case UPIO_AU:
size = 0x100000;
/* fall thru */
case UPIO_TSI:
case UPIO_MEM32:
case UPIO_MEM:
if (!up->port.mapbase)
break;
@ -2007,17 +2011,15 @@ static int serial8250_request_rsa_resource(struct uart_8250_port *up)
{
unsigned long start = UART_RSA_BASE << up->port.regshift;
unsigned int size = 8 << up->port.regshift;
int ret = 0;
int ret = -EINVAL;
switch (up->port.iotype) {
case UPIO_MEM:
ret = -EINVAL;
break;
case UPIO_HUB6:
case UPIO_PORT:
start += up->port.iobase;
if (!request_region(start, size, "serial-rsa"))
if (request_region(start, size, "serial-rsa"))
ret = 0;
else
ret = -EBUSY;
break;
}
@ -2031,9 +2033,6 @@ static void serial8250_release_rsa_resource(struct uart_8250_port *up)
unsigned int size = 8 << up->port.regshift;
switch (up->port.iotype) {
case UPIO_MEM:
break;
case UPIO_HUB6:
case UPIO_PORT:
release_region(up->port.iobase + offset, size);