serial: omap: Make context_loss_cnt signed
get_context_loss_count returns an int however it is stored in
unsigned integer context_loss_cnt . This patch tries to make
context_loss_cnt int. So that in case of errors the value
(which may be negative) is not interpreted wrongly.
In serial_omap_runtime_resume in case of errors returned by
get_context_loss_count print a warning and do a restore.
Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 6ede6fd..fd0fb8c 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -96,7 +96,7 @@
unsigned char msr_saved_flags;
char name[20];
unsigned long port_activity;
- u32 context_loss_cnt;
+ int context_loss_cnt;
u32 errata;
u8 wakeups_enabled;
unsigned int irq_pending:1;
@@ -1556,11 +1556,15 @@
{
struct uart_omap_port *up = dev_get_drvdata(dev);
- u32 loss_cnt = serial_omap_get_context_loss_count(up);
+ int loss_cnt = serial_omap_get_context_loss_count(up);
- if (up->context_loss_cnt != loss_cnt)
+ if (loss_cnt < 0) {
+ dev_err(dev, "serial_omap_get_context_loss_count failed : %d\n",
+ loss_cnt);
serial_omap_restore_context(up);
-
+ } else if (up->context_loss_cnt != loss_cnt) {
+ serial_omap_restore_context(up);
+ }
up->latency = up->calc_latency;
schedule_work(&up->qos_work);
