Currently, KGDB's 8250 driver always reports IRQs as handled, though it
registers the line with IRQF_SHARED. This patch fixes the behavior by
returning the appropriate values from the interrupt handler.
Signed-off-by: Jan Kiszka <[EMAIL PROTECTED]>
---
drivers/serial/8250_kgdb.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
Index: b/drivers/serial/8250_kgdb.c
===================================================================
--- a/drivers/serial/8250_kgdb.c
+++ b/drivers/serial/8250_kgdb.c
@@ -152,14 +152,15 @@ static int kgdb_get_debug_char(void)
static irqreturn_t
kgdb8250_interrupt(int irq, void *dev_id)
{
- if (kgdb_ioread(UART_IIR) & UART_IIR_RDI) {
- /* Throw away the data if another I/O routine is active. */
- if (kgdb_io_ops.read_char != kgdb_get_debug_char &&
- (kgdb_ioread(UART_LSR) & UART_LSR_DR))
- kgdb_ioread(UART_RX);
- else
- breakpoint();
- }
+ if (!(kgdb_ioread(UART_IIR) & UART_IIR_RDI))
+ return IRQ_NONE;
+
+ /* Throw away the data if another I/O routine is active. */
+ if (kgdb_io_ops.read_char != kgdb_get_debug_char &&
+ (kgdb_ioread(UART_LSR) & UART_LSR_DR))
+ kgdb_ioread(UART_RX);
+ else
+ breakpoint();
return IRQ_HANDLED;
}
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