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authorPaul Burton <paul.burton@imgtec.com>2016-10-05 20:18:14 +0300
committerRalf Baechle <ralf@linux-mips.org>2016-10-06 19:01:28 +0300
commitf23020230e682a43cc4706cabb041bba469df2d6 (patch)
tree50a67f63a49b3e63273848c936173de59cb05149 /arch/mips/mti-malta
parent87dd9a4de421f052fd9be58c7da08a453f340d5e (diff)
downloadlinux-f23020230e682a43cc4706cabb041bba469df2d6.tar.xz
MIPS: Sanitise coherentio semantics
The coherentio variable has previously been used as a boolean value, indicating whether the user specified that coherent I/O should be enabled or disabled. It failed to take into account the case where the user does not specify any preference, in which case it makes sense that we should default to coherent I/O if the hardware supports it (hw_coherentio is non-zero). Introduce an enum to clarify the 3 different values of coherentio & use it throughout the code, modifying plat_device_is_coherent() & r4k_cache_init() to take into account the default case. Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Paul Burton <paul.burton@imgtec.com> Patchwork: https://patchwork.linux-mips.org/patch/14347/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mti-malta')
-rw-r--r--arch/mips/mti-malta/malta-setup.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/mti-malta/malta-setup.c b/arch/mips/mti-malta/malta-setup.c
index 7e7364b0501e..f1b6074828b1 100644
--- a/arch/mips/mti-malta/malta-setup.c
+++ b/arch/mips/mti-malta/malta-setup.c
@@ -154,12 +154,12 @@ static void __init plat_setup_iocoherency(void)
* coherency instead.
*/
if (plat_enable_iocoherency()) {
- if (coherentio == 0)
+ if (coherentio == IO_COHERENCE_DISABLED)
pr_info("Hardware DMA cache coherency disabled\n");
else
pr_info("Hardware DMA cache coherency enabled\n");
} else {
- if (coherentio == 1)
+ if (coherentio == IO_COHERENCE_ENABLED)
pr_info("Hardware DMA cache coherency unsupported, but enabled from command line!\n");
else
pr_info("Software DMA cache coherency enabled\n");