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parisc: Drop locking in pdc console code

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No need to have specific locking for console I/O since
the PDC functions provide an own locking.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # 6.1+
This commit is contained in:
Helge Deller 2022-12-17 17:45:40 +01:00
parent 7e6652c79e
commit 7dc4dbfe75
1 changed files with 3 additions and 13 deletions
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16
arch/parisc/kernel/pdc_cons.c
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@ -12,37 +12,27 @@
#include <asm/page.h> /* for PAGE0 */ #include <asm/page.h> /* for PAGE0 */
#include <asm/pdc.h> /* for iodc_call() proto and friends */ #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) static void pdc_console_write(struct console *co, const char *s, unsigned count)
{ {
int i = 0; int i = 0;
unsigned long flags;
spin_lock_irqsave(&pdc_console_lock, flags);
do { do {
i += pdc_iodc_print(s + i, count - i); i += pdc_iodc_print(s + i, count - i);
} while (i < count); } while (i < count);
spin_unlock_irqrestore(&pdc_console_lock, flags);
} }
#ifdef CONFIG_KGDB #ifdef CONFIG_KGDB
static int kgdb_pdc_read_char(void) static int kgdb_pdc_read_char(void)
{ {
int c; int c = pdc_iodc_getc();
unsigned long flags;
spin_lock_irqsave(&pdc_console_lock, flags);
c = pdc_iodc_getc();
spin_unlock_irqrestore(&pdc_console_lock, flags);
return (c <= 0) ? NO_POLL_CHAR : c; return (c <= 0) ? NO_POLL_CHAR : c;
} }
static void kgdb_pdc_write_char(u8 chr) static void kgdb_pdc_write_char(u8 chr)
{ {
if (PAGE0->mem_cons.cl_class != CL_DUPLEX) /* no need to print char as it's shown on standard console */
pdc_console_write(NULL, &chr, 1); /* pdc_iodc_print(&chr, 1); */
} }
static struct kgdb_io kgdb_pdc_io_ops = { static struct kgdb_io kgdb_pdc_io_ops = {