From c2623065331a9ae93f7dbd9d1bc7b4d46d0415a6 Mon Sep 17 00:00:00 2001
From: Dong Du <Dd_nirvana@sjtu.edu.cn>
Date: Sat, 28 Aug 2021 14:45:02 +0800
Subject: lib: sbi: protect dprintf output with spinlock
Avoid getting messages from multiple harts (using dprintf and printf)
concurrently with a spinlock serializaing calls to sbi_dprintf(),
sbi_printf() and sbi_puts()
Signed-off-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
---
lib/sbi/sbi_console.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/lib/sbi/sbi_console.c b/lib/sbi/sbi_console.c
index b54f7a2..29eede3 100644
--- a/lib/sbi/sbi_console.c
+++ b/lib/sbi/sbi_console.c
@@ -387,8 +387,11 @@ int sbi_dprintf(const char *format, ...)
struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
va_start(args, format);
- if (scratch->options & SBI_SCRATCH_DEBUG_PRINTS)
+ if (scratch->options & SBI_SCRATCH_DEBUG_PRINTS) {
+ spin_lock(&console_out_lock);
retval = print(NULL, NULL, format, args);
+ spin_unlock(&console_out_lock);
+ }
va_end(args);
return retval;
--
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