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

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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 <[email protected]>
Signed-off-by: Nicholas Piggin <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
This commit is contained in:
Nicholas Piggin 2018-05-01 00:55:52 +10:00 • committed by Michael Ellerman
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;
}
}
}