Re: [PATCH v3 1/5] firmware: generalize "firmware" as "system data" helpers

["Luis R. Rodriguez" <mcgrof@suse.com>]

On Mon, Jan 04, 2016 at 12:41:07PM -0800, Kees Cook wrote:
> On Wed, Dec 23, 2015 at 1:34 PM, Luis R. Rodriguez
> <mcgrof@do-not-panic.com> wrote:
> > From: "Luis R. Rodriguez" <mcgrof@suse.com>
> >
> > Historically firmware_class code was added to help
> > get device driver firmware binaries but these days
> > request_firmware*() helpers are being repurposed for
> > general system data needed by the kernel.
> >
> > Annotate this before we extend firmare_class more,
> > as this is expected. We want to generalize the code
> > as much as possible.
> >
> > Cc: Rusty Russell <rusty@rustcorp.com.au>
> > Cc: Andrew Morton <akpm@linux-foundation.org>
> > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > Cc: David Howells <dhowells@redhat.com>
> > Cc: Kees Cook <keescook@chromium.org>
> > Cc: Casey Schaufler <casey@schaufler-ca.com>
> > Cc: Ming Lei <ming.lei@canonical.com>
> > Cc: Takashi Iwai <tiwai@suse.de>
> > Cc: Vojtěch Pavlík <vojtech@suse.cz>
> > Cc: Kyle McMartin <kyle@kernel.org>
> > Cc: Matthew Garrett <mjg59@srcf.ucam.org>
> > Cc: linux-kernel@vger.kernel.org
> > Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
> > ---
> >  drivers/base/firmware_class.c | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
> > index 8524450e75bd..6f5fcda71a60 100644
> > --- a/drivers/base/firmware_class.c
> > +++ b/drivers/base/firmware_class.c
> > @@ -353,15 +353,15 @@ static int fw_get_filesystem_firmware(struct device *device,
> >                 rc = fw_read_file_contents(file, buf);
> >                 fput(file);
> >                 if (rc)
> > -                       dev_warn(device, "firmware, attempted to load %s, but failed with error %d\n",
> > -                               path, rc);
> > +                       dev_warn(device, "system data, attempted to load %s, but failed with error %d\n",
> > +                                path, rc);
> 
> Since dev_warn should already be prefixing the string, I would think
> "firmware, " should just be removed entirely instead of replaced?

Its a good point, the messages could also be simplified further. Here's
a more generic form and patch description that I'll wrap into a v4
iteration after Mimi's patches go in.

[PATCH] firmware: simplify generic "firmware" helpers

Historically firmware_class code was added to help
get device driver firmware binaries but these days
request_firmware*() helpers are being repurposed for
general system data needed by the kernel.

To make the generic set of routines that will be shared
with generic system data helpers simplify a few of
the shared debug and warn print outs, the prints already
have the device associated as dev_*() helpers are used.
This will help generalize shared code as much as possible.

Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Cc: Ming Lei <ming.lei@canonical.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Vojtěch Pavlík <vojtech@suse.cz>
Cc: Kyle McMartin <kyle@kernel.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
---
 drivers/base/firmware_class.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 8524450e75bd..3358f5df926f 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -353,15 +353,15 @@ static int fw_get_filesystem_firmware(struct device *device,
 		rc = fw_read_file_contents(file, buf);
 		fput(file);
 		if (rc)
-			dev_warn(device, "firmware, attempted to load %s, but failed with error %d\n",
-				path, rc);
+			dev_warn(device, "loading %s failed with error %d\n",
+				 path, rc);
 		else
 			break;
 	}
 	__putname(path);
 
 	if (!rc) {
-		dev_dbg(device, "firmware: direct-loading firmware %s\n",
+		dev_dbg(device, "direct-loading %s\n",
 			buf->fw_id);
 		mutex_lock(&fw_lock);
 		set_bit(FW_STATUS_DONE, &buf->status);
@@ -1051,7 +1051,7 @@ _request_firmware_prepare(struct firmware **firmware_p, const char *name,
 	}
 
 	if (fw_get_builtin_firmware(firmware, name)) {
-		dev_dbg(device, "firmware: using built-in firmware %s\n", name);
+		dev_dbg(device, "using built-in %s\n", name);
 		return 0; /* assigned */
 	}
 
-- 
2.7.0