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ACPI / table: Always count matched and successfully parsed entries 

acpi_parse_entries() allows to traverse all available table entries (aka
subtables) by passing max_entries parameter equal to 0, but since its count
variable is only incremented if max_entries is not 0, the function always
returns 0 for max_entries equal to 0.  It would be more useful if it returned
the number of entries matched instead, so make it increment count in that
case too.

Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Tomasz Nowicki 2014-11-26 22:01:14 +08:00 committed by Rafael J. Wysocki
parent f08bb472bf
commit 4ceacd02f5
1 changed files with 4 additions and 1 deletions
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5
drivers/acpi/tables.c
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@ -224,10 +224,13 @@ acpi_parse_entries(char *id, unsigned long table_size,
while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
table_end) {
if (entry->type == entry_id
&& (!max_entries || count++ < max_entries))
&& (!max_entries || count < max_entries)) {
if (handler(entry, table_end))
return -EINVAL;
count++;
}
/*
* If entry->length is 0, break from this loop to avoid
* infinite loop.