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ARM: 5874/1: serial21285: fix disable_irq-from-interrupt-handler deadlock 

The console hangs during bootup when disable_irq is called from the
transmit interrupt handler (it will wait forever for it's "own"
interrupt in synchronize_irq). Fix by using disable_irq_nosync()
instead.

Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Simon Kagstrom 2010-01-11 15:57:24 +01:00 committed by Russell King
parent 4c9f8be7da
commit cc20b900be
1 changed files with 2 additions and 2 deletions
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4
drivers/serial/21285.c
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@ -58,7 +58,7 @@ static const char serial21285_name[] = "Footbridge UART";
static void serial21285_stop_tx(struct uart_port *port) static void serial21285_stop_tx(struct uart_port *port)
{ {
if (tx_enabled(port)) { if (tx_enabled(port)) {
disable_irq(IRQ_CONTX); disable_irq_nosync(IRQ_CONTX);
tx_enabled(port) = 0; tx_enabled(port) = 0;
} }
} }
@ -74,7 +74,7 @@ static void serial21285_start_tx(struct uart_port *port)
static void serial21285_stop_rx(struct uart_port *port) static void serial21285_stop_rx(struct uart_port *port)
{ {
if (rx_enabled(port)) { if (rx_enabled(port)) {
disable_irq(IRQ_CONRX); disable_irq_nosync(IRQ_CONRX);
rx_enabled(port) = 0; rx_enabled(port) = 0;
} }
} }