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firmware: dmi: handle missing DMI data gracefully 

Currently, when booting a kernel with DMI support on a platform that has
no DMI tables, the following output is emitted into the kernel log:

  [    0.128818] DMI not present or invalid.
  ...
  [    1.306659] dmi: Firmware registration failed.
  ...
  [    2.908681] dmi-sysfs: dmi entry is absent.

The first one is a pr_info(), but the subsequent ones are pr_err()s that
complain about a condition that is not really an error to begin with.

So let's clean this up, and give up silently if dma_available is not set.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Martin Hundebøll <mnhu@prevas.dk>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
This commit is contained in:
Ard Biesheuvel 2018-02-03 11:25:20 +01:00 committed by Jean Delvare
parent a7770ae194
commit a81114d03e
2 changed files with 3 additions and 5 deletions
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2
drivers/firmware/dmi-sysfs.c
View File

@ -652,7 +652,7 @@ static int __init dmi_sysfs_init(void)
int val;
if (!dmi_kobj) {
pr_err("dmi-sysfs: dmi entry is absent.\n");
pr_debug("dmi-sysfs: dmi entry is absent.\n");
error = -ENODATA;
goto err;
}

6
drivers/firmware/dmi_scan.c
View File

@ -704,10 +704,8 @@ static int __init dmi_init(void)
u8 *dmi_table;
int ret = -ENOMEM;
if (!dmi_available) {
ret = -ENODATA;
goto err;
}
if (!dmi_available)
return 0;
/*
* Set up dmi directory at /sys/firmware/dmi. This entry should stay