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firmware_class: make request_firmware_nowait more useful

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Unfortunately, one cannot hold on to the struct firmware
that request_firmware_nowait() hands off, which is needed
in some cases. Allow this by requiring the callback to
free it (via release_firmware).

Additionally, give it a gfp_t parameter -- all the current
users call it from a GFP_KERNEL context so the GFP_ATOMIC
isn't necessary. This also marks an API break which is
useful in a sense, although that is obviously not the
primary purpose of this change.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Cc: Ming Lei <tom.leiming@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Woodhouse <David.Woodhouse@intel.com>
Cc: Pavel Roskin <proski@gnu.org>
Cc: Abhay Salunke <abhay_salunke@dell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Johannes Berg
2009-10-29 12:36:02 +01:00
committed by Greg Kroah-Hartman
parent 03d673e6af
commit 9ebfbd45f9
7 changed files with 33 additions and 20 deletions
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8
drivers/serial/ucc_uart.c
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@@ -1179,16 +1179,18 @@ static void uart_firmware_cont(const struct firmware *fw, void *context)
if (firmware->header.length != fw->size) {
dev_err(dev, "invalid firmware\n");
return;
goto out;
}
ret = qe_upload_firmware(firmware);
if (ret) {
dev_err(dev, "could not load firmware\n");
return;
goto out;
}
firmware_loaded = 1;
out:
release_firmware(fw);
}
static int ucc_uart_probe(struct of_device *ofdev,
@@ -1247,7 +1249,7 @@ static int ucc_uart_probe(struct of_device *ofdev,
*/
ret = request_firmware_nowait(THIS_MODULE,
FW_ACTION_HOTPLUG, filename, &ofdev->dev,
&ofdev->dev, uart_firmware_cont);
GFP_KERNEL, &ofdev->dev, uart_firmware_cont);
if (ret) {
dev_err(&ofdev->dev,
"could not load firmware %s\n",