diff options
Diffstat (limited to 'sys/contrib/dev/acpica/exfldio.c')
| -rw-r--r-- | sys/contrib/dev/acpica/exfldio.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sys/contrib/dev/acpica/exfldio.c b/sys/contrib/dev/acpica/exfldio.c index ad40aec984e43..24c9a2a23e978 100644 --- a/sys/contrib/dev/acpica/exfldio.c +++ b/sys/contrib/dev/acpica/exfldio.c @@ -1,7 +1,7 @@ /****************************************************************************** * * Module Name: amfldio - Aml Field I/O - * $Revision: 37 $ + * $Revision: 39 $ * *****************************************************************************/ @@ -572,7 +572,8 @@ AcpiAmlWriteFieldDataWithUpdateRule ( /* Check if update rule needs to be applied (not if mask is all ones) */ - if (((1 << BitGranularity) -1) & ~Mask) + /* The left shift drops the bits we want to ignore. */ + if ((~Mask << (sizeof(Mask)*8 - BitGranularity)) != 0) { /* * Read the current contents of the byte/word/dword containing |