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authorAubrey Li <aubrey.li@intel.com>2021-08-06 03:46:24 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-08-16 18:06:40 +0300
commit2bbfa0addd63fd06756b7af8bf146ae166e2abf5 (patch)
tree8db19f551231f382e004463c5e195175e89b6e3e /drivers/acpi/prmt.c
parent7c60610d476766e128cc4284bb6349732cbd6606 (diff)
downloadlinux-2bbfa0addd63fd06756b7af8bf146ae166e2abf5.tar.xz
ACPI: PRM: Deal with table not present or no module found
On the system PRMT table is not present, dmesg output: $ dmesg | grep PRM [ 1.532237] ACPI: PRMT not present [ 1.532237] PRM: found 4294967277 modules The result of acpi_table_parse_entries need to be checked and return immediately if PRMT table is not present or no PRM module found. Signed-off-by: Aubrey Li <aubrey.li@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/prmt.c')
-rw-r--r--drivers/acpi/prmt.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/acpi/prmt.c b/drivers/acpi/prmt.c
index 31cf9aee5edd..1f6007abcf18 100644
--- a/drivers/acpi/prmt.c
+++ b/drivers/acpi/prmt.c
@@ -292,6 +292,12 @@ void __init init_prmt(void)
int mc = acpi_table_parse_entries(ACPI_SIG_PRMT, sizeof(struct acpi_table_prmt) +
sizeof (struct acpi_table_prmt_header),
0, acpi_parse_prmt, 0);
+ /*
+ * Return immediately if PRMT table is not present or no PRM module found.
+ */
+ if (mc <= 0)
+ return;
+
pr_info("PRM: found %u modules\n", mc);
status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,