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tty: hvc: remove unexplained "just in case" spin delay 

This delay was in the very first OPAL console commit 6.5 years ago,
and came from the vio hvc driver. The firmware console has hardened
sufficiently to remove it.

Reviewed-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
hifive-unleashed-5.1
Nicholas Piggin 2018-05-01 00:55:52 +10:00 committed by Michael Ellerman
parent 17cc1dd492
commit cca3d5290e
1 changed files with 1 additions and 7 deletions
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8
drivers/tty/hvc/hvc_opal.c
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@ -313,14 +313,8 @@ static int udbg_opal_getc(void)
int ch;
for (;;) {
ch = udbg_opal_getc_poll();
if (ch == -1) {
/* This shouldn't be needed...but... */
volatile unsigned long delay;
for (delay=0; delay < 2000000; delay++)
;
} else {
if (ch != -1)
return ch;
}
}
}