diff options
Diffstat (limited to 'target/linux/generic/pending-4.19')
| -rw-r--r-- | target/linux/generic/pending-4.19/800-bcma-get-SoC-device-struct-copy-its-DMA-params-to-th.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/generic/pending-4.19/800-bcma-get-SoC-device-struct-copy-its-DMA-params-to-th.patch b/target/linux/generic/pending-4.19/800-bcma-get-SoC-device-struct-copy-its-DMA-params-to-th.patch new file mode 100644 index 0000000000..03ee3b43b1 --- /dev/null +++ b/target/linux/generic/pending-4.19/800-bcma-get-SoC-device-struct-copy-its-DMA-params-to-th.patch @@ -0,0 +1,80 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Subject: [PATCH] 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> +--- + +--- a/drivers/bcma/host_soc.c ++++ b/drivers/bcma/host_soc.c +@@ -191,6 +191,8 @@ int __init bcma_host_soc_init(struct bcm + 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) +--- a/drivers/bcma/main.c ++++ b/drivers/bcma/main.c +@@ -236,12 +236,16 @@ EXPORT_SYMBOL(bcma_core_irq); + + void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core) + { ++ struct device *dev = &core->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); + 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: +--- a/include/linux/bcma/bcma_soc.h ++++ b/include/linux/bcma/bcma_soc.h +@@ -6,6 +6,7 @@ + + struct bcma_soc { + struct bcma_bus bus; ++ struct device *dev; + }; + + int __init bcma_host_soc_register(struct bcma_soc *soc); |