Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
authored by
Nicholas Piggin
and committed by
Michael Ellerman
cca3d529
17cc1dd4
+1
-7
+1
-7
drivers/tty/hvc/hvc_opal.c
+1
-7
drivers/tty/hvc/hvc_opal.c
···
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int ch;
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for (;;) {
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ch = udbg_opal_getc_poll();
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-
if (ch == -1) {
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-
/* This shouldn't be needed...but... */
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-
volatile unsigned long delay;
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-
for (delay=0; delay < 2000000; delay++)
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-
;
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-
} else {
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+
if (ch != -1)
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return ch;
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-
}
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}
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}
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