From: Russell King <rmk@dyn-67.arm.linux.org.uk>
Date: Sat, 13 Sep 2008 20:23:06 +0000 (+0100)
Subject: [ARM] Fix PCI_DMA_BUS_IS_PHYS for ARM
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=88c381bf09d7b3f2c2e8749150087aff2c434be4;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[ARM] Fix PCI_DMA_BUS_IS_PHYS for ARM

PCI_DMA_BUS_IS_PHYS was defined to be zero, which meant we ignored
the DMA mask for IDE and SCSI transfers.  This is wrong - we have
no DMA translation hardware.  We want to obey DMA masks so that the
block layer performs bouncing itself.

Reported-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/include/asm/pci.h b/arch/arm/include/asm/pci.h
index 721c03d53f4b..918d0cbbf064 100644
--- a/arch/arm/include/asm/pci.h
+++ b/arch/arm/include/asm/pci.h
@@ -30,7 +30,7 @@ static inline void pcibios_penalize_isa_irq(int irq, int active)
  * The networking and block device layers use this boolean for bounce
  * buffer decisions.
  */
-#define PCI_DMA_BUS_IS_PHYS     (0)
+#define PCI_DMA_BUS_IS_PHYS     (1)
 
 /*
  * Whether pci_unmap_{single,page} is a nop depends upon the