[PATCH 2/2 resend] USB: host: Introduce flag to enable use of 64-bit dma_mask for ehci-platform
From: Andreas Herrmann <hidden>
Date: 2014-12-15 13:30:46
Subsystem:
mips, the rest, usb ehci driver, usb subsystem · Maintainers:
Thomas Bogendoerfer, Linus Torvalds, Alan Stern, Greg Kroah-Hartman
ehci-octeon driver used a 64-bit dma_mask. With removal of ehci-octeon and usage of ehci-platform ehci dma_mask is now limited to 32 bits (coerced in ehci_platform_probe). Provide a flag in ehci platform data to allow use of 64 bits for dma_mask. Cc: David Daney <redacted> Cc: Alex Smith <redacted> Cc: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Andreas Herrmann <redacted> Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi> --- arch/mips/cavium-octeon/octeon-platform.c | 4 +--- drivers/usb/host/ehci-platform.c | 3 ++- include/linux/usb/ehci_pdriver.h | 1 + 3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index eea60b6..12410a2 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c@@ -310,6 +310,7 @@ static struct usb_ehci_pdata octeon_ehci_pdata = { #ifdef __BIG_ENDIAN .big_endian_mmio = 1, #endif + .dma_mask_64 = 1, .power_on = octeon_ehci_power_on, .power_off = octeon_ehci_power_off, };
@@ -331,8 +332,6 @@ static void __init octeon_ehci_hw_start(struct device *dev) octeon2_usb_clocks_stop(); } -static u64 octeon_ehci_dma_mask = DMA_BIT_MASK(64); - static int __init octeon_ehci_device_init(void) { struct platform_device *pd;
@@ -347,7 +346,6 @@ static int __init octeon_ehci_device_init(void) if (!pd) return 0; - pd->dev.dma_mask = &octeon_ehci_dma_mask; pd->dev.platform_data = &octeon_ehci_pdata; octeon_ehci_hw_start(&pd->dev);
diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index 5b8533f..37abbe2 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c@@ -155,7 +155,8 @@ static int ehci_platform_probe(struct platform_device *dev) if (!pdata) pdata = &ehci_platform_defaults; - err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32)); + err = dma_coerce_mask_and_coherent(&dev->dev, + pdata->dma_mask_64 ? DMA_BIT_MASK(64) : DMA_BIT_MASK(32)); if (err) return err;
diff --git a/include/linux/usb/ehci_pdriver.h b/include/linux/usb/ehci_pdriver.h
index 7eb4dcd..f69529e 100644
--- a/include/linux/usb/ehci_pdriver.h
+++ b/include/linux/usb/ehci_pdriver.h@@ -45,6 +45,7 @@ struct usb_ehci_pdata { unsigned big_endian_desc:1; unsigned big_endian_mmio:1; unsigned no_io_watchdog:1; + unsigned dma_mask_64:1; /* Turn on all power and clocks */ int (*power_on)(struct platform_device *pdev);
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1.7.9.5