From 5b587496dc63595b71265d986ce69728c2724370 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Wed, 10 Oct 2018 13:00:59 +0200 Subject: [PATCH] brcmfmac: Remove recursion from firmware load error handling Before this commit brcmf_fw_request_done would call brcmf_fw_request_next_item to load the next item, which on an error would call brcmf_fw_request_done, which if the error is recoverable (*) will then continue calling brcmf_fw_request_next_item for the next item again which on an error will call brcmf_fw_request_done again... This does not blow up because we only have a limited number of items so we never recurse too deep. But the recursion is still quite ugly and frankly is giving me a headache, so lets fix this. This commit fixes this by removing brcmf_fw_request_next_item and by making brcmf_fw_get_firmwares and brcmf_fw_request_done directly call firmware_request_nowait resp. firmware_request themselves. *) brcmf_fw_request_nvram_done fallback path succeeds or BRCMF_FW_REQF_OPTIONAL is set Signed-off-by: Hans de Goede Signed-off-by: Kalle Valo --- .../broadcom/brcm80211/brcmfmac/firmware.c | 65 ++++++------------- 1 file changed, 19 insertions(+), 46 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c index 784c84f0e9e7..08aaf99fee34 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c @@ -532,33 +532,6 @@ static int brcmf_fw_complete_request(const struct firmware *fw, return (cur->flags & BRCMF_FW_REQF_OPTIONAL) ? 0 : ret; } -static int brcmf_fw_request_next_item(struct brcmf_fw *fwctx, bool async) -{ - struct brcmf_fw_item *cur; - const struct firmware *fw = NULL; - int ret; - - cur = &fwctx->req->items[fwctx->curpos]; - - brcmf_dbg(TRACE, "%srequest for %s\n", async ? "async " : "", - cur->path); - - if (async) - ret = request_firmware_nowait(THIS_MODULE, true, cur->path, - fwctx->dev, GFP_KERNEL, fwctx, - brcmf_fw_request_done); - else - ret = request_firmware(&fw, cur->path, fwctx->dev); - - if (ret < 0) { - brcmf_fw_request_done(NULL, fwctx); - } else if (!async && fw) { - brcmf_fw_complete_request(fw, fwctx); - return -EAGAIN; - } - return 0; -} - static void brcmf_fw_request_done(const struct firmware *fw, void *ctx) { struct brcmf_fw *fwctx = ctx; @@ -568,26 +541,19 @@ static void brcmf_fw_request_done(const struct firmware *fw, void *ctx) cur = &fwctx->req->items[fwctx->curpos]; ret = brcmf_fw_complete_request(fw, fwctx); - if (ret < 0) - goto fail; - - do { - if (++fwctx->curpos == fwctx->req->n_items) { - ret = 0; - goto done; - } - ret = brcmf_fw_request_next_item(fwctx, false); - } while (ret == -EAGAIN); - - return; + while (ret == 0 && ++fwctx->curpos < fwctx->req->n_items) { + cur = &fwctx->req->items[fwctx->curpos]; + request_firmware(&fw, cur->path, fwctx->dev); + ret = brcmf_fw_complete_request(fw, ctx); + } -fail: - brcmf_dbg(TRACE, "failed err=%d: dev=%s, fw=%s\n", ret, - dev_name(fwctx->dev), cur->path); - brcmf_fw_free_request(fwctx->req); - fwctx->req = NULL; -done: + if (ret) { + brcmf_dbg(TRACE, "failed err=%d: dev=%s, fw=%s\n", ret, + dev_name(fwctx->dev), cur->path); + brcmf_fw_free_request(fwctx->req); + fwctx->req = NULL; + } fwctx->done(fwctx->dev, ret, fwctx->req); kfree(fwctx); } @@ -611,7 +577,9 @@ int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req, void (*fw_cb)(struct device *dev, int err, struct brcmf_fw_request *req)) { + struct brcmf_fw_item *first = &req->items[0]; struct brcmf_fw *fwctx; + int ret; brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev)); if (!fw_cb) @@ -628,7 +596,12 @@ int brcmf_fw_get_firmwares(struct device *dev, struct brcmf_fw_request *req, fwctx->req = req; fwctx->done = fw_cb; - brcmf_fw_request_next_item(fwctx, true); + ret = request_firmware_nowait(THIS_MODULE, true, first->path, + fwctx->dev, GFP_KERNEL, fwctx, + brcmf_fw_request_done); + if (ret < 0) + brcmf_fw_request_done(NULL, fwctx); + return 0; } -- 2.30.2