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lib: sbi: protect dprintf output with spinlock

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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>
This commit is contained in:
Dong Du
2021-08-28 14:45:02 +08:00
committed by Anup Patel
parent bd316e2c9b
commit c262306533
1 changed files with 4 additions and 1 deletions
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5
lib/sbi/sbi_console.c
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@@ -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;