On 11/23/22 16:24, Helge Deller wrote:
Commit 027c3d345e2a ("parisc: Convert PDC console to an early console")
broke (physical) keyboard input for kgdb due to the spinlocks used in
the PDC console function.
Fix it by using using PDC calls which are not protected by spinlocks.
Fixes: 027c3d345e2a ("parisc: Convert PDC console to an early console")
Signed-off-by: Helge Deller <deller@xxxxxx>
I dropped this series as it didn't fixed my problem:
The USB keyboard on my C3000 probably needs a USB reset when a HPMC
occurs to get it working again.
Helge
---
arch/parisc/kernel/pdc_cons.c | 14 ++------------
1 file changed, 2 insertions(+), 12 deletions(-)
diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c
index 7d0989f523d0..bb498c6d51c2 100644
--- a/arch/parisc/kernel/pdc_cons.c
+++ b/arch/parisc/kernel/pdc_cons.c
@@ -12,29 +12,19 @@
#include <asm/page.h> /* for PAGE0 */
#include <asm/pdc.h> /* for iodc_call() proto and friends */
-static DEFINE_SPINLOCK(pdc_console_lock);
-
static void pdc_console_write(struct console *co, const char *s, unsigned count)
{
int i = 0;
- unsigned long flags;
- spin_lock_irqsave(&pdc_console_lock, flags);
do {
i += pdc_iodc_print(s + i, count - i);
} while (i < count);
- spin_unlock_irqrestore(&pdc_console_lock, flags);
}
#ifdef CONFIG_KGDB
static int kgdb_pdc_read_char(void)
{
- int c;
- unsigned long flags;
-
- spin_lock_irqsave(&pdc_console_lock, flags);
- c = pdc_iodc_getc();
- spin_unlock_irqrestore(&pdc_console_lock, flags);
+ int c = pdc_iodc_getc_unlocked();
return (c <= 0) ? NO_POLL_CHAR : c;
}
@@ -42,7 +32,7 @@ static int kgdb_pdc_read_char(void)
static void kgdb_pdc_write_char(u8 chr)
{
if (PAGE0->mem_cons.cl_class != CL_DUPLEX)
- pdc_console_write(NULL, &chr, 1);
+ pdc_iodc_print_unlocked(&chr, 1);
}
static struct kgdb_io kgdb_pdc_io_ops = {
--
2.38.1
