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ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users

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This patch removes the users of the deprectated APIs:
 acpi_get_table_with_size()
 early_acpi_os_unmap_memory()
The following APIs should be used instead of:
 acpi_get_table()
 acpi_put_table()

The deprecated APIs are invented to be a replacement of acpi_get_table()
during the early stage so that the early mapped pointer will not be stored
in ACPICA core and thus the late stage acpi_get_table() won't return a
wrong pointer. The mapping size is returned just because it is required by
early_acpi_os_unmap_memory() to unmap the pointer during early stage.

But as the mapping size equals to the acpi_table_header.length
(see acpi_tb_init_table_descriptor() and acpi_tb_validate_table()), when
such a convenient result is returned, driver code will start to use it
instead of accessing acpi_table_header to obtain the length.

Thus this patch cleans up the drivers by replacing returned table size with
acpi_table_header.length, and should be a no-op.

Reported-by: Dan Williams <[email protected]>
Signed-off-by: Lv Zheng <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Lv Zheng 2016-12-14 15:04:39 +08:00 • committed by Rafael J. Wysocki
commit 6b11d1d677
10 changed files with 29 additions and 42 deletions
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5
drivers/mailbox/pcc.c
View file

@ -446,7 +446,6 @@ static int pcc_parse_subspace_irq(int id,
*/
static int __init acpi_pcc_probe(void)
{
acpi_size pcct_tbl_header_size;
struct acpi_table_header *pcct_tbl;
struct acpi_subtable_header *pcct_entry;
struct acpi_table_pcct *acpi_pcct_tbl;
@ -455,9 +454,7 @@ static int __init acpi_pcc_probe(void)
acpi_status status = AE_OK;
/* Search for PCCT */
status = acpi_get_table_with_size(ACPI_SIG_PCCT, 0,
&pcct_tbl,
&pcct_tbl_header_size);
status = acpi_get_table(ACPI_SIG_PCCT, 0, &pcct_tbl);
if (ACPI_FAILURE(status) || !pcct_tbl) {
pr_warn("PCCT header not found.\n");