From 213042bba186b995bc2f25c8c2d06a9652177fa3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= Date: Tue, 27 Sep 2022 17:09:49 +0200 Subject: Import Turris OS kernel patches --- ...C-device-struct-copy-its-DMA-params-to-th.patch | 85 ++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 nixos/modules/kernel-patches/0076-bcma-get-SoC-device-struct-copy-its-DMA-params-to-th.patch (limited to 'nixos/modules/kernel-patches/0076-bcma-get-SoC-device-struct-copy-its-DMA-params-to-th.patch') diff --git a/nixos/modules/kernel-patches/0076-bcma-get-SoC-device-struct-copy-its-DMA-params-to-th.patch b/nixos/modules/kernel-patches/0076-bcma-get-SoC-device-struct-copy-its-DMA-params-to-th.patch new file mode 100644 index 0000000..b57de84 --- /dev/null +++ b/nixos/modules/kernel-patches/0076-bcma-get-SoC-device-struct-copy-its-DMA-params-to-th.patch @@ -0,0 +1,85 @@ +From 77ef3ddbb02d11c3aac1f4174959f7e3d898070b Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Tue, 27 Sep 2022 16:22:10 +0200 +Subject: [PATCH 76/96] bcma: get SoC device struct & copy its DMA params to + the subdevices +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +For bus devices to be fully usable it's required to set their DMA +parameters. + +For years it has been missing and remained unnoticed because of +mips_dma_alloc_coherent() silently handling the empty coherent_dma_mask. +Kernel 4.19 came with a lot of DMA changes and caused a regression on +the bcm47xx. Starting with the commit f8c55dc6e828 ("MIPS: use generic +dma noncoherent ops for simple noncoherent platforms") DMA coherent +allocations just fail. Example: +[ 1.114914] bgmac_bcma bcma0:2: Allocation of TX ring 0x200 failed +[ 1.121215] bgmac_bcma bcma0:2: Unable to alloc memory for DMA +[ 1.127626] bgmac_bcma: probe of bcma0:2 failed with error -12 +[ 1.133838] bgmac_bcma: Broadcom 47xx GBit MAC driver loaded + +This change fixes above regression in addition to the MIPS bcm47xx +commit 321c46b91550 ("MIPS: BCM47XX: Setup struct device for the SoC"). + +It also fixes another *old* GPIO regression caused by a parent pointing +to the NULL: +[ 0.157054] missing gpiochip .dev parent pointer +[ 0.157287] bcma: bus0: Error registering GPIO driver: -22 +introduced by the commit 74f4e0cc6108 ("bcma: switch GPIO portions to +use GPIOLIB_IRQCHIP"). + +Fixes: f8c55dc6e828 ("MIPS: use generic dma noncoherent ops for simple noncoherent platforms") +Fixes: 74f4e0cc6108 ("bcma: switch GPIO portions to use GPIOLIB_IRQCHIP") +Cc: linux-mips@linux-mips.org +Cc: Christoph Hellwig +Cc: Linus Walleij +Signed-off-by: Rafał Miłecki +--- + drivers/bcma/host_soc.c | 2 ++ + drivers/bcma/main.c | 10 +++++++--- + 2 files changed, 9 insertions(+), 3 deletions(-) + +diff --git a/drivers/bcma/host_soc.c b/drivers/bcma/host_soc.c +index 90d5bdc12e03..fd2e8ff17c76 100644 +--- a/drivers/bcma/host_soc.c ++++ b/drivers/bcma/host_soc.c +@@ -191,6 +191,8 @@ int __init bcma_host_soc_init(struct bcma_soc *soc) + struct bcma_bus *bus = &soc->bus; + int err; + ++ bus->dev = soc->dev; ++ + /* Scan bus and initialize it */ + err = bcma_bus_early_register(bus); + if (err) +diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c +index 44392b624b20..71e8ce05079a 100644 +--- a/drivers/bcma/main.c ++++ b/drivers/bcma/main.c +@@ -236,13 +236,17 @@ EXPORT_SYMBOL(bcma_core_irq); + + void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core) + { +- device_initialize(&core->dev); ++ struct device *dev = &core->dev; ++ ++ device_initialize(dev); + core->dev.release = bcma_release_core_dev; + core->dev.bus = &bcma_bus_type; +- dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index); ++ dev_set_name(dev, "bcma%d:%d", bus->num, core->core_index); + core->dev.parent = bus->dev; +- if (bus->dev) ++ if (bus->dev) { + bcma_of_fill_device(bus->dev, core); ++ dma_coerce_mask_and_coherent(dev, bus->dev->coherent_dma_mask); ++ } + + switch (bus->hosttype) { + case BCMA_HOSTTYPE_PCI: +-- +2.37.2 + -- cgit v1.2.3