Input: at32psif - do not sleep in atomic context

We can't use msleep() while holding a spinlock, moreower serio's write()
method is supposed to be useable from inettrupt context. Let's do what
i8042 does and poll the status register every 50 us (with udelay).

Reported-by: Marjan Fojkar <marjan@pajkc.eu>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/input/serio/at32psif.c b/drivers/input/serio/at32psif.c
index 50bdc00c49d..b54452a8c77 100644
--- a/drivers/input/serio/at32psif.c
+++ b/drivers/input/serio/at32psif.c
@@ -137,7 +137,7 @@ static int psif_write(struct serio *io, unsigned char val)
         spin_lock_irqsave(&psif->lock, flags);
 
         while (!(psif_readl(psif, SR) & PSIF_BIT(TXEMPTY)) && timeout--)
-                msleep(10);
+                udelay(50);
 
         if (timeout >= 0) {
                 psif_writel(psif, THR, val);