Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-28 07:01:32 +00:00
Code Issues Packages Projects Releases Wiki Activity

WMI: Remove unnecessary null test

Browse Source 
This patch removes the null test on block. block is initialized at the
beginning of the function to &wblock->gblock. Since wblock is
dereferenced prior to the null test, wblock must be a valid pointer,
and &wblock->gblock cannot be null.

The following Coccinelle script is used for detecting the change:

@r@
expression e,f;
identifier g,y;
statement S1,S2;
@@

*e = &f->g
<+...
 f->y
 ...+>
*if (e != NULL || ...)
 S1 else S2

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Himangi Saraogi 2014-07-15 22:49:11 +05:30 committed by Matthew Garrett
parent bd3c7b9ef7
commit 959ef6d5de
1 changed files with 0 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/platform/x86/wmi.c
View File

@ -256,10 +256,6 @@ static acpi_status wmi_method_enable(struct wmi_block *wblock, int enable)
block = &wblock->gblock;
handle = wblock->handle;
if (!block)
return AE_NOT_EXIST;
snprintf(method, 5, "WE%02X", block->notify_id);
status = acpi_execute_simple_method(handle, method, enable);