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authorLuis R. Rodriguez <mcgrof@suse.com>2014-07-02 20:55:05 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-07-09 02:28:16 +0400
commitc868edf42b4db89907b467c92b7f035c8c1cb0e5 (patch)
tree739f930880e8c098f01f88eb44a0bb5fac2c54c3 /include/linux/firmware.h
parenta76040d835776f0e8cc2bf5f9edcfa2092449ae9 (diff)
downloadlinux-c868edf42b4db89907b467c92b7f035c8c1cb0e5.tar.xz
firmware loader: inform direct failure when udev loader is disabled
Now that the udev firmware loader is optional request_firmware() will not provide any information on the kernel ring buffer if direct firmware loading failed and udev firmware loading is disabled. If no information is needed request_firmware_direct() should be used for optional firmware, at which point drivers can take on the onus over informing of any failures, if udev firmware loading is disabled though we should at the very least provide some sort of information as when the udev loader was enabled by default back in the days. With this change with a simple firmware load test module [0]: Example output without FW_LOADER_USER_HELPER_FALLBACK platform fake-dev.0: Direct firmware load for fake.bin failed with error -2 Example with FW_LOADER_USER_HELPER_FALLBACK platform fake-dev.0: Direct firmware load for fake.bin failed with error -2 platform fake-dev.0: Falling back to user helper Without this change without FW_LOADER_USER_HELPER_FALLBACK we get no output logged upon failure. Cc: Tom Gundersen <teg@jklm.no> Cc: Ming Lei <ming.lei@canonical.com> Cc: Abhay Salunke <Abhay_Salunke@dell.com> Cc: Stefan Roese <sr@denx.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Kay Sievers <kay@vrfy.org> Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/firmware.h')
-rw-r--r--include/linux/firmware.h15
1 files changed, 8 insertions, 7 deletions
diff --git a/include/linux/firmware.h b/include/linux/firmware.h
index 67e5b801af0c..5c41c5e75b5c 100644
--- a/include/linux/firmware.h
+++ b/include/linux/firmware.h
@@ -45,6 +45,8 @@ int request_firmware_nowait(
struct module *module, bool uevent,
const char *name, struct device *device, gfp_t gfp, void *context,
void (*cont)(const struct firmware *fw, void *context));
+int request_firmware_direct(const struct firmware **fw, const char *name,
+ struct device *device);
void release_firmware(const struct firmware *fw);
#else
@@ -66,13 +68,12 @@ static inline void release_firmware(const struct firmware *fw)
{
}
-#endif
+static inline int request_firmware_direct(const struct firmware **fw,
+ const char *name,
+ struct device *device)
+{
+ return -EINVAL;
+}
-#ifdef CONFIG_FW_LOADER_USER_HELPER_FALLBACK
-int request_firmware_direct(const struct firmware **fw, const char *name,
- struct device *device);
-#else
-#define request_firmware_direct request_firmware
#endif
-
#endif