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mac80211: brcmfmac: backport firmware loading cleanup 

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
openwrt-19.07
Rafał Miłecki 2018-11-07 09:43:14 +01:00
parent b50f162b3c
commit 5932eb690f
3 changed files with 244 additions and 12 deletions
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102
package/kernel/mac80211/patches/brcm/320-v4.21-0001-brcmfmac-Remove-firmware-loading-code-duplication.patch Normal file
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@ -0,0 +1,102 @@
From a1a3b762163868ad07a4499a73df324f40d5ab0b Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Wed, 10 Oct 2018 13:00:58 +0200
Subject: [PATCH] brcmfmac: Remove firmware-loading code duplication
brcmf_fw_request_next_item and brcmf_fw_request_done both have identical
code to complete the fw-request depending on the item-type.
This commit adds a new brcmf_fw_complete_request helper removing this code
duplication.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
.../broadcom/brcm80211/brcmfmac/firmware.c | 62 +++++++++++-----------
1 file changed, 31 insertions(+), 31 deletions(-)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/firmware.c
@@ -504,6 +504,34 @@ fail:
return -ENOENT;
}
+static int brcmf_fw_complete_request(const struct firmware *fw,
+ struct brcmf_fw *fwctx)
+{
+ struct brcmf_fw_item *cur = &fwctx->req->items[fwctx->curpos];
+ int ret = 0;
+
+ brcmf_dbg(TRACE, "firmware %s %sfound\n", cur->path, fw ? "" : "not ");
+
+ switch (cur->type) {
+ case BRCMF_FW_TYPE_NVRAM:
+ ret = brcmf_fw_request_nvram_done(fw, fwctx);
+ break;
+ case BRCMF_FW_TYPE_BINARY:
+ if (fw)
+ cur->binary = fw;
+ else
+ ret = -ENOENT;
+ break;
+ default:
+ /* something fishy here so bail out early */
+ brcmf_err("unknown fw type: %d\n", cur->type);
+ release_firmware(fw);
+ ret = -EINVAL;
+ }
+
+ 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;
@@ -525,15 +553,7 @@ static int brcmf_fw_request_next_item(st
if (ret < 0) {
brcmf_fw_request_done(NULL, fwctx);
} else if (!async && fw) {
- brcmf_dbg(TRACE, "firmware %s %sfound\n", cur->path,
- fw ? "" : "not ");
- if (cur->type == BRCMF_FW_TYPE_BINARY)
- cur->binary = fw;
- else if (cur->type == BRCMF_FW_TYPE_NVRAM)
- brcmf_fw_request_nvram_done(fw, fwctx);
- else
- release_firmware(fw);
-
+ brcmf_fw_complete_request(fw, fwctx);
return -EAGAIN;
}
return 0;
@@ -547,28 +567,8 @@ static void brcmf_fw_request_done(const
cur = &fwctx->req->items[fwctx->curpos];
- brcmf_dbg(TRACE, "enter: firmware %s %sfound\n", cur->path,
- fw ? "" : "not ");
-
- if (!fw)
- ret = -ENOENT;
-
- switch (cur->type) {
- case BRCMF_FW_TYPE_NVRAM:
- ret = brcmf_fw_request_nvram_done(fw, fwctx);
- break;
- case BRCMF_FW_TYPE_BINARY:
- cur->binary = fw;
- break;
- default:
- /* something fishy here so bail out early */
- brcmf_err("unknown fw type: %d\n", cur->type);
- release_firmware(fw);
- ret = -EINVAL;
- goto fail;
- }
-
- if (ret < 0 && !(cur->flags & BRCMF_FW_REQF_OPTIONAL))
+ ret = brcmf_fw_complete_request(fw, fwctx);
+ if (ret < 0)
goto fail;
do {

126
package/kernel/mac80211/patches/brcm/320-v4.21-0002-brcmfmac-Remove-recursion-from-firmware-load-error-h.patch Normal file
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@ -0,0 +1,126 @@
From 5b587496dc63595b71265d986ce69728c2724370 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
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 <hdegoede@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
.../broadcom/brcm80211/brcmfmac/firmware.c | 65 +++++++---------------
1 file changed, 19 insertions(+), 46 deletions(-)
--- 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(con
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
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
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
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;
}

28
package/kernel/mac80211/patches/brcm/860-brcmfmac-register-wiphy-s-during-module_init.patch
View File

@ -31,33 +31,37 @@ Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
};
static void brcmf_fw_request_done(const struct firmware *fw, void *ctx);
@@ -589,6 +590,8 @@ fail:
fwctx->req = NULL;
done:
@@ -555,6 +556,8 @@ static void brcmf_fw_request_done(const
fwctx->req = NULL;
}
fwctx->done(fwctx->dev, ret, fwctx->req);
+ if (fwctx->completion)
+ complete(fwctx->completion);
kfree(fwctx);
}
@@ -612,6 +615,8 @@ int brcmf_fw_get_firmwares(struct device
struct brcmf_fw_request *req))
@@ -579,6 +582,7 @@ int brcmf_fw_get_firmwares(struct device
{
struct brcmf_fw_item *first = &req->items[0];
struct brcmf_fw *fwctx;
+ struct completion completion;
+ int err;
int ret;
brcmf_dbg(TRACE, "enter: dev=%s\n", dev_name(dev));
if (!fw_cb)
@@ -628,7 +633,14 @@ int brcmf_fw_get_firmwares(struct device
@@ -595,6 +599,9 @@ int brcmf_fw_get_firmwares(struct device
fwctx->dev = dev;
fwctx->req = req;
fwctx->done = fw_cb;
+
+ init_completion(&completion);
+ fwctx->completion = &completion;
+
brcmf_fw_request_next_item(fwctx, true);
+
ret = request_firmware_nowait(THIS_MODULE, true, first->path,
fwctx->dev, GFP_KERNEL, fwctx,
@@ -602,6 +609,9 @@ int brcmf_fw_get_firmwares(struct device
if (ret < 0)
brcmf_fw_request_done(NULL, fwctx);
+ wait_for_completion_timeout(fwctx->completion, msecs_to_jiffies(5000));
+ fwctx->completion = NULL;
+