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45ce9897c0
This fixes bgmac DMA allocations with kernel 4.19. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
81 lines
2.8 KiB
Diff
81 lines
2.8 KiB
Diff
From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Subject: [PATCH] bcma: get SoC device struct & copy its DMA params to the
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subdevices
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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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For bus devices to be fully usable it's required to set their DMA
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parameters.
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For years it has been missing and remained unnoticed because of
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mips_dma_alloc_coherent() silently handling the empty coherent_dma_mask.
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Kernel 4.19 came with a lot of DMA changes and caused a regression on
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the bcm47xx. Starting with the commit f8c55dc6e828 ("MIPS: use generic
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dma noncoherent ops for simple noncoherent platforms") DMA coherent
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allocations just fail. Example:
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[ 1.114914] bgmac_bcma bcma0:2: Allocation of TX ring 0x200 failed
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[ 1.121215] bgmac_bcma bcma0:2: Unable to alloc memory for DMA
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[ 1.127626] bgmac_bcma: probe of bcma0:2 failed with error -12
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[ 1.133838] bgmac_bcma: Broadcom 47xx GBit MAC driver loaded
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This change fixes above regression in addition to the MIPS bcm47xx
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commit 321c46b91550 ("MIPS: BCM47XX: Setup struct device for the SoC").
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It also fixes another *old* GPIO regression caused by a parent pointing
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to the NULL:
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[ 0.157054] missing gpiochip .dev parent pointer
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[ 0.157287] bcma: bus0: Error registering GPIO driver: -22
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introduced by the commit 74f4e0cc6108 ("bcma: switch GPIO portions to
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use GPIOLIB_IRQCHIP").
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Fixes: f8c55dc6e828 ("MIPS: use generic dma noncoherent ops for simple noncoherent platforms")
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Fixes: 74f4e0cc6108 ("bcma: switch GPIO portions to use GPIOLIB_IRQCHIP")
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Cc: linux-mips@linux-mips.org
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Cc: Christoph Hellwig <hch@lst.de>
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Cc: Linus Walleij <linus.walleij@linaro.org>
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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---
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--- a/drivers/bcma/host_soc.c
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+++ b/drivers/bcma/host_soc.c
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@@ -191,6 +191,8 @@ int __init bcma_host_soc_init(struct bcm
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struct bcma_bus *bus = &soc->bus;
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int err;
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+ bus->dev = soc->dev;
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+
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/* Scan bus and initialize it */
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err = bcma_bus_early_register(bus);
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if (err)
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--- a/drivers/bcma/main.c
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+++ b/drivers/bcma/main.c
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@@ -236,12 +236,16 @@ EXPORT_SYMBOL(bcma_core_irq);
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void bcma_prepare_core(struct bcma_bus *bus, struct bcma_device *core)
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{
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+ struct device *dev = &core->dev;
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+
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core->dev.release = bcma_release_core_dev;
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core->dev.bus = &bcma_bus_type;
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dev_set_name(&core->dev, "bcma%d:%d", bus->num, core->core_index);
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core->dev.parent = bus->dev;
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- if (bus->dev)
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+ if (bus->dev) {
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bcma_of_fill_device(bus->dev, core);
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+ dma_coerce_mask_and_coherent(dev, bus->dev->coherent_dma_mask);
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+ }
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switch (bus->hosttype) {
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case BCMA_HOSTTYPE_PCI:
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--- a/include/linux/bcma/bcma_soc.h
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+++ b/include/linux/bcma/bcma_soc.h
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@@ -6,6 +6,7 @@
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struct bcma_soc {
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struct bcma_bus bus;
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+ struct device *dev;
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};
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int __init bcma_host_soc_register(struct bcma_soc *soc);
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