* FAILED: patch "[PATCH] wifi: brcmfmac: set F2 blocksize to 256 for BCM43752" failed to apply to 6.6-stable tree
@ 2026-07-29 13:14 gregkh
2026-08-06 13:57 ` [PATCH 6.6.y 1/2] wifi: brcmfmac: fix 43752 SDIO FWVID incorrectly labelled as Cypress (CYW) Sasha Levin
0 siblings, 1 reply; 3+ messages in thread
From: gregkh @ 2026-07-29 13:14 UTC (permalink / raw)
To: zaq14760, arend.vanspriel, johannes.berg; +Cc: stable
The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 29ab31f3f27157648f2f7e6d5e1fd9792fdf0614
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026072949-theorize-monogamy-e1ff@gregkh' --subject-prefix 'PATCH 6.6.y' 'HEAD^..'
Possible dependencies:
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 29ab31f3f27157648f2f7e6d5e1fd9792fdf0614 Mon Sep 17 00:00:00 2001
From: LiangCheng Wang <zaq14760@gmail.com>
Date: Wed, 15 Jul 2026 14:49:38 +0800
Subject: [PATCH] wifi: brcmfmac: set F2 blocksize to 256 for BCM43752
The BCM43752 is not reliable with the default 512-byte SDIO function 2
block size: on an i.MX8MP board with an AMPAK AP6275S module at
SDR104 / 200 MHz, an iperf TX stress test kills WLAN within seconds:
mmc_submit_one: CMD53 sg block write failed -84
brcmf_sdio_dpc: failed backplane access over SDIO, halting operation
Commit d2587c57ffd8 ("brcmfmac: add 43752 SDIO ids and initialization")
set up the 43752 like the 4373 for the F2 watermark but missed the F2
block size, which the 4373 limits to 256 bytes. The vendor driver
(bcmdhd) also programs a 256-byte F2 block size for this chip and runs
the same hardware without errors.
Group the 43752 with the 4373, matching the F2 watermark handling.
With this change a 10-minute bidirectional iperf3 soak completes with
zero SDIO errors at ~270 Mbit/s in each direction.
Backporting note: kernels before v6.18 name this id
SDIO_DEVICE_ID_BROADCOM_CYPRESS_43752, so on those trees the case
label added by this patch must be adjusted to that name. Cherry-picking
the rename commit 74e2ef72bd4b ("wifi: brcmfmac: fix 43752 SDIO FWVID
incorrectly labelled as Cypress (CYW)") first is not a clean
alternative: on trees before v6.17 its context collides with the 43751
additions, and trees before v6.2 lack the FWVID framework it touches.
Fixes: d2587c57ffd8 ("brcmfmac: add 43752 SDIO ids and initialization")
Cc: stable@vger.kernel.org # see patch description, needs adjustments for <= 6.17
Signed-off-by: LiangCheng Wang <zaq14760@gmail.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Link: https://patch.msgid.link/20260715-b43752-f2-blksz-v2-1-f9be49856050@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index ec487c6f2e38..869c4872d399 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -911,6 +911,7 @@ int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev)
return ret;
}
switch (sdiodev->func2->device) {
+ case SDIO_DEVICE_ID_BROADCOM_43752:
case SDIO_DEVICE_ID_BROADCOM_CYPRESS_4373:
f2_blksz = SDIO_4373_FUNC2_BLOCKSIZE;
break;
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH 6.6.y 1/2] wifi: brcmfmac: fix 43752 SDIO FWVID incorrectly labelled as Cypress (CYW)
2026-07-29 13:14 FAILED: patch "[PATCH] wifi: brcmfmac: set F2 blocksize to 256 for BCM43752" failed to apply to 6.6-stable tree gregkh
@ 2026-08-06 13:57 ` Sasha Levin
2026-08-06 13:57 ` [PATCH 6.6.y 2/2] wifi: brcmfmac: set F2 blocksize to 256 for BCM43752 Sasha Levin
0 siblings, 1 reply; 3+ messages in thread
From: Sasha Levin @ 2026-08-06 13:57 UTC (permalink / raw)
To: stable; +Cc: Gokul Sivakumar, Arend van Spriel, Johannes Berg, Sasha Levin
From: Gokul Sivakumar <gokulkumar.sivakumar@infineon.com>
[ Upstream commit 74e2ef72bd4b25ce21c8f309d4f5b91b5df9ff5b ]
Cypress(Infineon) is not the vendor for this 43752 SDIO WLAN chip, and so
has not officially released any firmware binary for it. It is incorrect to
maintain this WLAN chip with firmware vendor ID as "CYW". So relabel the
chip's firmware Vendor ID as "WCC" as suggested by the maintainer.
Fixes: d2587c57ffd8 ("brcmfmac: add 43752 SDIO ids and initialization")
Fixes: f74f1ec22dc2 ("wifi: brcmfmac: add support for Cypress firmware api")
Signed-off-by: Gokul Sivakumar <gokulkumar.sivakumar@infineon.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Link: https://patch.msgid.link/20250724101136.6691-1-gokulkumar.sivakumar@infineon.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Stable-dep-of: 29ab31f3f271 ("wifi: brcmfmac: set F2 blocksize to 256 for BCM43752")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 2 +-
drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c | 4 ++--
drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 8 ++++----
.../net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h | 2 +-
include/linux/mmc/sdio_ids.h | 2 +-
5 files changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index 14f3c4900f56c..e76d993026565 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -991,9 +991,9 @@ static const struct sdio_device_id brcmf_sdmmc_ids[] = {
BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4354, WCC),
BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4356, WCC),
BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4359, WCC),
+ BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43752, WCC),
BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_CYPRESS_4373, CYW),
BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_CYPRESS_43012, CYW),
- BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_CYPRESS_43752, CYW),
BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_CYPRESS_89359, CYW),
CYW_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_CYPRESS_43439, CYW),
{ /* end: all zeroes */ }
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
index 4dbb1898f3065..e3a01a28a1820 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
@@ -738,7 +738,7 @@ static u32 brcmf_chip_tcm_rambase(struct brcmf_chip_priv *ci)
case BRCM_CC_4364_CHIP_ID:
case CY_CC_4373_CHIP_ID:
return 0x160000;
- case CY_CC_43752_CHIP_ID:
+ case BRCM_CC_43752_CHIP_ID:
case BRCM_CC_4377_CHIP_ID:
return 0x170000;
case BRCM_CC_4378_CHIP_ID:
@@ -1465,7 +1465,7 @@ bool brcmf_chip_sr_capable(struct brcmf_chip *pub)
reg = chip->ops->read32(chip->ctx, addr);
return (reg & CC_SR_CTL0_ENABLE_MASK) != 0;
case BRCM_CC_4359_CHIP_ID:
- case CY_CC_43752_CHIP_ID:
+ case BRCM_CC_43752_CHIP_ID:
case CY_CC_43012_CHIP_ID:
addr = CORE_CC_REG(pmu->base, retention_ctl);
reg = chip->ops->read32(chip->ctx, addr);
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
index 1ab0f501017bc..e9f1d66378980 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c
@@ -654,10 +654,10 @@ static const struct brcmf_firmware_mapping brcmf_sdio_fwnames[] = {
BRCMF_FW_ENTRY(BRCM_CC_4354_CHIP_ID, 0xFFFFFFFF, 4354),
BRCMF_FW_ENTRY(BRCM_CC_4356_CHIP_ID, 0xFFFFFFFF, 4356),
BRCMF_FW_ENTRY(BRCM_CC_4359_CHIP_ID, 0xFFFFFFFF, 4359),
+ BRCMF_FW_ENTRY(BRCM_CC_43752_CHIP_ID, 0xFFFFFFFF, 43752),
BRCMF_FW_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373),
BRCMF_FW_ENTRY(CY_CC_43012_CHIP_ID, 0xFFFFFFFF, 43012),
BRCMF_FW_ENTRY(CY_CC_43439_CHIP_ID, 0xFFFFFFFF, 43439),
- BRCMF_FW_ENTRY(CY_CC_43752_CHIP_ID, 0xFFFFFFFF, 43752)
};
#define TXCTL_CREDITS 2
@@ -3425,8 +3425,8 @@ static int brcmf_sdio_download_firmware(struct brcmf_sdio *bus,
static bool brcmf_sdio_aos_no_decode(struct brcmf_sdio *bus)
{
- if (bus->ci->chip == CY_CC_43012_CHIP_ID ||
- bus->ci->chip == CY_CC_43752_CHIP_ID)
+ if (bus->ci->chip == BRCM_CC_43752_CHIP_ID ||
+ bus->ci->chip == CY_CC_43012_CHIP_ID)
return true;
else
return false;
@@ -4274,8 +4274,8 @@ static void brcmf_sdio_firmware_callback(struct device *dev, int err,
bus->hostintmask, NULL);
switch (sdiod->func1->device) {
+ case SDIO_DEVICE_ID_BROADCOM_43752:
case SDIO_DEVICE_ID_BROADCOM_CYPRESS_4373:
- case SDIO_DEVICE_ID_BROADCOM_CYPRESS_43752:
brcmf_dbg(INFO, "set F2 watermark to 0x%x*4 bytes\n",
CY_4373_F2_WATERMARK);
brcmf_sdiod_writeb(sdiod, SBSDIO_WATERMARK,
diff --git a/drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h b/drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h
index 44684bf1b9acc..2f886af068c5b 100644
--- a/drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h
+++ b/drivers/net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h
@@ -52,13 +52,13 @@
#define BRCM_CC_43664_CHIP_ID 43664
#define BRCM_CC_43666_CHIP_ID 43666
#define BRCM_CC_4371_CHIP_ID 0x4371
+#define BRCM_CC_43752_CHIP_ID 43752
#define BRCM_CC_4377_CHIP_ID 0x4377
#define BRCM_CC_4378_CHIP_ID 0x4378
#define BRCM_CC_4387_CHIP_ID 0x4387
#define CY_CC_4373_CHIP_ID 0x4373
#define CY_CC_43012_CHIP_ID 43012
#define CY_CC_43439_CHIP_ID 43439
-#define CY_CC_43752_CHIP_ID 43752
/* USB Device IDs */
#define BRCM_USB_43143_DEVICE_ID 0xbd1e
diff --git a/include/linux/mmc/sdio_ids.h b/include/linux/mmc/sdio_ids.h
index 7fada7a714fed..3a09426aff5ee 100644
--- a/include/linux/mmc/sdio_ids.h
+++ b/include/linux/mmc/sdio_ids.h
@@ -76,7 +76,7 @@
#define SDIO_DEVICE_ID_BROADCOM_43430 0xa9a6
#define SDIO_DEVICE_ID_BROADCOM_43439 0xa9af
#define SDIO_DEVICE_ID_BROADCOM_43455 0xa9bf
-#define SDIO_DEVICE_ID_BROADCOM_CYPRESS_43752 0xaae8
+#define SDIO_DEVICE_ID_BROADCOM_43752 0xaae8
#define SDIO_VENDOR_ID_CYPRESS 0x04b4
#define SDIO_DEVICE_ID_BROADCOM_CYPRESS_43439 0xbd3d
--
2.53.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH 6.6.y 2/2] wifi: brcmfmac: set F2 blocksize to 256 for BCM43752
2026-08-06 13:57 ` [PATCH 6.6.y 1/2] wifi: brcmfmac: fix 43752 SDIO FWVID incorrectly labelled as Cypress (CYW) Sasha Levin
@ 2026-08-06 13:57 ` Sasha Levin
0 siblings, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2026-08-06 13:57 UTC (permalink / raw)
To: stable; +Cc: LiangCheng Wang, Arend van Spriel, Johannes Berg, Sasha Levin
From: LiangCheng Wang <zaq14760@gmail.com>
[ Upstream commit 29ab31f3f27157648f2f7e6d5e1fd9792fdf0614 ]
The BCM43752 is not reliable with the default 512-byte SDIO function 2
block size: on an i.MX8MP board with an AMPAK AP6275S module at
SDR104 / 200 MHz, an iperf TX stress test kills WLAN within seconds:
mmc_submit_one: CMD53 sg block write failed -84
brcmf_sdio_dpc: failed backplane access over SDIO, halting operation
Commit d2587c57ffd8 ("brcmfmac: add 43752 SDIO ids and initialization")
set up the 43752 like the 4373 for the F2 watermark but missed the F2
block size, which the 4373 limits to 256 bytes. The vendor driver
(bcmdhd) also programs a 256-byte F2 block size for this chip and runs
the same hardware without errors.
Group the 43752 with the 4373, matching the F2 watermark handling.
With this change a 10-minute bidirectional iperf3 soak completes with
zero SDIO errors at ~270 Mbit/s in each direction.
Backporting note: kernels before v6.18 name this id
SDIO_DEVICE_ID_BROADCOM_CYPRESS_43752, so on those trees the case
label added by this patch must be adjusted to that name. Cherry-picking
the rename commit 74e2ef72bd4b ("wifi: brcmfmac: fix 43752 SDIO FWVID
incorrectly labelled as Cypress (CYW)") first is not a clean
alternative: on trees before v6.17 its context collides with the 43751
additions, and trees before v6.2 lack the FWVID framework it touches.
Fixes: d2587c57ffd8 ("brcmfmac: add 43752 SDIO ids and initialization")
Cc: stable@vger.kernel.org # see patch description, needs adjustments for <= 6.17
Signed-off-by: LiangCheng Wang <zaq14760@gmail.com>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Link: https://patch.msgid.link/20260715-b43752-f2-blksz-v2-1-f9be49856050@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index e76d993026565..8865c94156ab3 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -906,6 +906,7 @@ int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev)
return ret;
}
switch (sdiodev->func2->device) {
+ case SDIO_DEVICE_ID_BROADCOM_43752:
case SDIO_DEVICE_ID_BROADCOM_CYPRESS_4373:
f2_blksz = SDIO_4373_FUNC2_BLOCKSIZE;
break;
--
2.53.0
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-08-06 13:58 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-07-29 13:14 FAILED: patch "[PATCH] wifi: brcmfmac: set F2 blocksize to 256 for BCM43752" failed to apply to 6.6-stable tree gregkh
2026-08-06 13:57 ` [PATCH 6.6.y 1/2] wifi: brcmfmac: fix 43752 SDIO FWVID incorrectly labelled as Cypress (CYW) Sasha Levin
2026-08-06 13:57 ` [PATCH 6.6.y 2/2] wifi: brcmfmac: set F2 blocksize to 256 for BCM43752 Sasha Levin
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