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29aab93ea2
The most important is probably regression fix in handling platform NVRAM. That bug stopped hardware from being properly calibrated breaking e.g. 5 GHz for Netgear R8000. Other than that it triggers memory dumps when experiencing firmware problems which is important for debugging purposes. Fixes:2811c97803("mac80211: backport brcmfmac firmware & clm_blob loading rework") Signed-off-by: Rafał Miłecki <rafal@milecki.pl> (cherry picked from commitb26214adb5)
42 lines
1.8 KiB
Diff
42 lines
1.8 KiB
Diff
From 299b6365a3b7cf7f5ea1c945a420e9ee4841d6f7 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Sun, 22 Jul 2018 23:46:25 +0200
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Subject: [PATCH] brcmfmac: fix regression in parsing NVRAM for multiple
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devices
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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NVRAM is designed to work with Broadcom's SDK Linux kernel which fakes
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PCI domain 0 for all internal MMIO devices. Since official Linux kernel
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uses platform devices for that purpose there is a mismatch in numbering
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PCI domains.
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There used to be a fix for that problem but it was accidentally dropped
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during the last firmware loading rework. That resulted in brcmfmac not
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being able to extract device specific NVRAM content and all kind of
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calibration problems.
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Reported-by: Aditya Xavier <adityaxavier@gmail.com>
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Fixes: 2baa3aaee27f ("brcmfmac: introduce brcmf_fw_alloc_request() function")
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Cc: stable@vger.kernel.org # v4.17+
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
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Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
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---
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drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
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+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
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@@ -1785,7 +1785,8 @@ brcmf_pcie_prepare_fw_request(struct brc
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fwreq->items[BRCMF_PCIE_FW_CODE].type = BRCMF_FW_TYPE_BINARY;
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fwreq->items[BRCMF_PCIE_FW_NVRAM].type = BRCMF_FW_TYPE_NVRAM;
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fwreq->items[BRCMF_PCIE_FW_NVRAM].flags = BRCMF_FW_REQF_OPTIONAL;
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- fwreq->domain_nr = pci_domain_nr(devinfo->pdev->bus);
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+ /* NVRAM reserves PCI domain 0 for Broadcom's SDK faked bus */
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+ fwreq->domain_nr = pci_domain_nr(devinfo->pdev->bus) + 1;
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fwreq->bus_nr = devinfo->pdev->bus->number;
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return fwreq;
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