[PATCH 1/2] powerpc/pseries: Allow firmware features to match partial strings
From: Michael Neuling <hidden>
Date: 2012-11-07 00:49:15
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
This allows firmware_features_table names to add a '*' at the end so that only partial strings are matched. When a '*' is added, only upto the '*' is matched when setting firmware feature bits. This is useful for the matching best energy feature. Signed-off-by: Michael Neuling <redacted> cc: Vaidyanathan Srinivasan <redacted> cc: Linux PPC dev <redacted> --- arch/powerpc/platforms/pseries/firmware.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c
index 0b0eff0..448c053 100644
--- a/arch/powerpc/platforms/pseries/firmware.c
+++ b/arch/powerpc/platforms/pseries/firmware.c@@ -33,6 +33,11 @@ typedef struct { char * name; } firmware_feature_t; +/* + * The names in this table match names in rtas/ibm,hypertas-functions. If the + * entry ends in a '*', only upto the '*' is matched. Otherwise the entire + * string must match. + */ static __initdata firmware_feature_t firmware_features_table[FIRMWARE_MAX_FEATURES] = { {FW_FEATURE_PFT, "hcall-pft"},
@@ -71,9 +76,20 @@ void __init fw_feature_init(const char *hypertas, unsigned long len) for (s = hypertas; s < hypertas + len; s += strlen(s) + 1) { for (i = 0; i < FIRMWARE_MAX_FEATURES; i++) { + const char *name = firmware_features_table[i].name; + size_t size; /* check value against table of strings */ - if (!firmware_features_table[i].name || - strcmp(firmware_features_table[i].name, s)) + if (!name) + continue; + /* + * If there is a '*' at the end of name, only check + * upto there + */ + size = strlen(name); + if (size && name[size - 1] == '*') { + if (strncmp(name, s, size - 1)) + continue; + } else if (strcmp(name, s)) continue; /* we have a match */
--
1.7.9.5