The patch that would first try the board-specific firmware
had a bug because the fallback would not be called: the
asynchronous interface is used meaning request_firmware_nowait()
returns 0 immediately.
Harden the firmware loading like this:
- If we cannot build an alt_path (like if no board_type is
specified) just request the first firmware without any
suffix, like in the past.
- If the lookup of a board specific firmware fails, we get
a NULL fw in the async callback, so just try again without
the alt_path. Use a static variable to check that we do not
try this indefinitely.
- Rename the brcm_fw_request_done to brcm_fw_request_done_first
reflecting the fact that this callback is only used for the
first (main) firmware file, and drop the unnecessary
prototype.
Fixes: 5ff013914c62 ("brcmfmac: firmware: Allow per-board firmware binaries")
Cc: Dmitry Osipenko <[email protected]>
Cc: Stefan Hansson <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
---
.../broadcom/brcm80211/brcmfmac/firmware.c | 29 +++++++++++++------
1 file changed, 20 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
index adfdfc654b10..71ca4a517e42 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
@@ -431,8 +431,6 @@ struct brcmf_fw {
void (*done)(struct device *dev, int err, struct brcmf_fw_request *req);
};
-static void brcmf_fw_request_done(const struct firmware *fw, void *ctx);
-
#ifdef CONFIG_EFI
/* In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV"
* to specify "worldwide" compatible settings, but these 2 ccode-s do not work
@@ -638,11 +636,26 @@ static int brcmf_fw_request_firmware(const struct firmware **fw,
return request_firmware(fw, cur->path, fwctx->dev);
}
-static void brcmf_fw_request_done(const struct firmware *fw, void *ctx)
+static void brcmf_fw_request_done_first(const struct firmware *fw, void *ctx)
{
struct brcmf_fw *fwctx = ctx;
+ struct brcmf_fw_item *first = &fwctx->req->items[0];
+ static bool retry = true;
int ret;
+ /*Something failed with the first firmware request , such as not
+ * getting the per-board firmware. Retry this, now using the less
+ * specific path for the first firmware item, i.e. without the board
+ * suffix.
+ */
+ if (!fw && retry) {
+ ret = request_firmware_nowait(THIS_MODULE, true, first->path,
+ fwctx->dev, GFP_KERNEL, fwctx,
+ brcmf_fw_request_done_first);
+ retry = false;
+ return;
+ }
+
ret = brcmf_fw_complete_request(fw, fwctx);
while (ret == 0 && ++fwctx->curpos < fwctx->req->n_items) {
@@ -702,17 +715,15 @@ int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req,
if (alt_path) {
ret = request_firmware_nowait(THIS_MODULE, true, alt_path,
fwctx->dev, GFP_KERNEL, fwctx,
- brcmf_fw_request_done);
+ brcmf_fw_request_done_first);
kfree(alt_path);
- }
- /* Else try canonical path */
- if (ret) {
+ } else {
ret = request_firmware_nowait(THIS_MODULE, true, first->path,
fwctx->dev, GFP_KERNEL, fwctx,
- brcmf_fw_request_done);
+ brcmf_fw_request_done_first);
}
if (ret < 0)
- brcmf_fw_request_done(NULL, fwctx);
+ brcmf_fw_request_done_first(NULL, fwctx);
return 0;
}
--
2.31.1
On 04-08-2021 01:27, Linus Walleij wrote:
> The patch that would first try the board-specific firmware
> had a bug because the fallback would not be called: the
> asynchronous interface is used meaning request_firmware_nowait()
> returns 0 immediately.
>
> Harden the firmware loading like this:
>
> - If we cannot build an alt_path (like if no board_type is
> specified) just request the first firmware without any
> suffix, like in the past.
>
> - If the lookup of a board specific firmware fails, we get
> a NULL fw in the async callback, so just try again without
> the alt_path. Use a static variable to check that we do not
> try this indefinitely.
>
> - Rename the brcm_fw_request_done to brcm_fw_request_done_first
> reflecting the fact that this callback is only used for the
> first (main) firmware file, and drop the unnecessary
> prototype.
>
> Fixes: 5ff013914c62 ("brcmfmac: firmware: Allow per-board firmware binaries")
> Cc: Dmitry Osipenko <[email protected]>
> Cc: Stefan Hansson <[email protected]>
One remark below, but you may add...
Reviewed-by: Arend van Spriel <[email protected]>
> Signed-off-by: Linus Walleij <[email protected]>
> ---
> .../broadcom/brcm80211/brcmfmac/firmware.c | 29 +++++++++++++------
> 1 file changed, 20 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> index adfdfc654b10..71ca4a517e42 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> @@ -431,8 +431,6 @@ struct brcmf_fw {
> void (*done)(struct device *dev, int err, struct brcmf_fw_request *req);
> };
>
> -static void brcmf_fw_request_done(const struct firmware *fw, void *ctx);
> -
> #ifdef CONFIG_EFI
> /* In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV"
> * to specify "worldwide" compatible settings, but these 2 ccode-s do not work
> @@ -638,11 +636,26 @@ static int brcmf_fw_request_firmware(const struct firmware **fw,
> return request_firmware(fw, cur->path, fwctx->dev);
> }
>
> -static void brcmf_fw_request_done(const struct firmware *fw, void *ctx)
> +static void brcmf_fw_request_done_first(const struct firmware *fw, void *ctx)
> {
> struct brcmf_fw *fwctx = ctx;
> + struct brcmf_fw_item *first = &fwctx->req->items[0];
> + static bool retry = true;
using a static seems tricky to me when there are multiple supported
devices in a system (like in mine ;-)). Probably better to add the flag
in struct brcmf_fw.
Regards,
Arend
04.08.2021 02:27, Linus Walleij пишет:
> The patch that would first try the board-specific firmware
> had a bug because the fallback would not be called: the
> asynchronous interface is used meaning request_firmware_nowait()
> returns 0 immediately.
>
> Harden the firmware loading like this:
>
> - If we cannot build an alt_path (like if no board_type is
> specified) just request the first firmware without any
> suffix, like in the past.
>
> - If the lookup of a board specific firmware fails, we get
> a NULL fw in the async callback, so just try again without
> the alt_path. Use a static variable to check that we do not
> try this indefinitely.
>
> - Rename the brcm_fw_request_done to brcm_fw_request_done_first
> reflecting the fact that this callback is only used for the
> first (main) firmware file, and drop the unnecessary
> prototype.
>
> Fixes: 5ff013914c62 ("brcmfmac: firmware: Allow per-board firmware binaries")
> Cc: Dmitry Osipenko <[email protected]>
> Cc: Stefan Hansson <[email protected]>
> Signed-off-by: Linus Walleij <[email protected]>
> ---
> .../broadcom/brcm80211/brcmfmac/firmware.c | 29 +++++++++++++------
> 1 file changed, 20 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> index adfdfc654b10..71ca4a517e42 100644
> --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
> @@ -431,8 +431,6 @@ struct brcmf_fw {
> void (*done)(struct device *dev, int err, struct brcmf_fw_request *req);
> };
>
> -static void brcmf_fw_request_done(const struct firmware *fw, void *ctx);
> -
> #ifdef CONFIG_EFI
> /* In some cases the EFI-var stored nvram contains "ccode=ALL" or "ccode=XV"
> * to specify "worldwide" compatible settings, but these 2 ccode-s do not work
> @@ -638,11 +636,26 @@ static int brcmf_fw_request_firmware(const struct firmware **fw,
> return request_firmware(fw, cur->path, fwctx->dev);
> }
>
> -static void brcmf_fw_request_done(const struct firmware *fw, void *ctx)
> +static void brcmf_fw_request_done_first(const struct firmware *fw, void *ctx)
> {
> struct brcmf_fw *fwctx = ctx;
> + struct brcmf_fw_item *first = &fwctx->req->items[0];
> + static bool retry = true;
> int ret;
>
> + /*Something failed with the first firmware request , such as not
There is a problem with whitespaces here.
> + * getting the per-board firmware. Retry this, now using the less
> + * specific path for the first firmware item, i.e. without the board
> + * suffix.
> + */
> + if (!fw && retry) {
> + ret = request_firmware_nowait(THIS_MODULE, true, first->path,
> + fwctx->dev, GFP_KERNEL, fwctx,
> + brcmf_fw_request_done_first);
> + retry = false;
> + return;
> + }
> +
> ret = brcmf_fw_complete_request(fw, fwctx);
>
> while (ret == 0 && ++fwctx->curpos < fwctx->req->n_items) {
> @@ -702,17 +715,15 @@ int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req,
> if (alt_path) {
> ret = request_firmware_nowait(THIS_MODULE, true, alt_path,
> fwctx->dev, GFP_KERNEL, fwctx,
> - brcmf_fw_request_done);
> + brcmf_fw_request_done_first);
> kfree(alt_path);
> - }
> - /* Else try canonical path */
> - if (ret) {
> + } else {
> ret = request_firmware_nowait(THIS_MODULE, true, first->path,
> fwctx->dev, GFP_KERNEL, fwctx,
> - brcmf_fw_request_done);
> + brcmf_fw_request_done_first);
> }
> if (ret < 0)
> - brcmf_fw_request_done(NULL, fwctx);
> + brcmf_fw_request_done_first(NULL, fwctx);
>
> return 0;
> }
>
Works, thanks!
On Wed, Aug 4, 2021 at 4:57 PM Dmitry Osipenko <[email protected]> wrote:
> Works, thanks!
I record this as Tested-by! :)
Yours,
Linus Walleij