05.08.2021 12:30, 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 context state 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 <digetx@xxxxxxxxx>
> Cc: Stefan Hansson <newbyte@xxxxxxxxxxx>
> Tested-by: Dmitry Osipenko <digetx@xxxxxxxxx>
> Reviewed-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
> Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> ---
> ChangeLog v2->v3:
> - Rename state variable to "tried_board_variant".
> ChangeLog v1->v2:
> - Instead of using a static variable, add a context variable
> "tested_board_variant"
> - Collect Arend's review tag.
> - Collect Tested-by from Dmitry.
> ---
Combining my previous comments together, I rewrote it like this:
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
index adfdfc654b10..4198ca9d898c 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
@@ -658,6 +656,21 @@ static void brcmf_fw_request_done(const struct firmware *fw, void *ctx)
kfree(fwctx);
}
+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];
+ int ret = 0;
+
+ if (!fw)
+ ret = request_firmware_nowait(THIS_MODULE, true, first->path,
+ fwctx->dev, GFP_KERNEL, fwctx,
+ brcmf_fw_request_done);
+
+ if (fw || ret < 0)
+ brcmf_fw_request_done(fw, ctx);
+}
+
static bool brcmf_fw_request_is_valid(struct brcmf_fw_request *req)
{
struct brcmf_fw_item *item;
@@ -702,11 +715,9 @@ 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);
--
