Import Turris OS kernel patches

1 files changed, 85 insertions, 0 deletions

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?= <rafal@milecki.pl>
+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 <hch@lst.de>
+Cc: Linus Walleij <linus.walleij@linaro.org>
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+---
+ 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
+