diff options
| author | Cyril Bur <cyrilbur@gmail.com> | 2017-03-22 14:13:28 +1100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-22 07:07:50 +0100 |
| commit | 132c93d4215c5ea12f8bb291249ede159d507b6e (patch) | |
| tree | 0e5472bb4b053e2156494dbd46bc46d8aa6e1743 /drivers/misc/aspeed-lpc-ctrl.c | |
| parent | ac1ddc584e9817d9d0a4572f3245305d907c6e61 (diff) | |
drivers/misc: Aspeed LPC control fix compile error and warning
pgprot_dmachoerent() is not defined on every architecture. Having
COMPILE_TEST set for the driver causes it to be compiled on
architectures which do not have pgprot_dmachoerent():
drivers/misc/aspeed-lpc-ctrl.c: In function 'aspeed_lpc_ctrl_mmap':
drivers/misc/aspeed-lpc-ctrl.c:51:9: error: implicit declaration of
function 'pgprot_dmacoherent' [-Werror=implicit-function-declaration]
prot = pgprot_dmacoherent(prot);
There are two possible solutions:
1. Remove COMPILE_TEST to ensure the driver is only compiled on ARM
2. Use pgprot_noncached() instead of pgprot_dmachoerent()
The first option results in less compile testing of the LPC control
driver which is undesirable.
The second option uses a function that is declared on all architectures
and therefore should always build. Currently there is no practical
difference between pgprot_noncached() and pgprot_dmachoerent() for the
aspeed chips that this driver is compatible with. The reason for
pgprot_dmachoerent() was that there may be chips made at some point in
the future that could include hardware that pgprot_dmachoerent() could
optimise for. As none of this hardware has even been announced there
isn't really a need for pgprot_dmachoerent().
Using pgprot_noncached() is completely correct and optimal for all
existing hardware on which the LPC control driver will run.
This commit also addresses that phys_addr_t should be printed using %pap
rather than %x:
In file included from include/linux/miscdevice.h:6:0,
from drivers/misc/aspeed-lpc-ctrl.c:11:
drivers/misc/aspeed-lpc-ctrl.c: In function 'aspeed_lpc_ctrl_probe':
drivers/misc/aspeed-lpc-ctrl.c:232:17: warning: format '%x' expects
argument of type 'unsigned int', but argument 3 has type 'phys_addr_t
{aka long long unsigned int}' [-Wformat=]
dev_info(dev, "Loaded at 0x%08x (0x%08x)\n",
Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/aspeed-lpc-ctrl.c')
| -rw-r--r-- | drivers/misc/aspeed-lpc-ctrl.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/misc/aspeed-lpc-ctrl.c b/drivers/misc/aspeed-lpc-ctrl.c index f6acbe1d9378..c654651a7b6d 100644 --- a/drivers/misc/aspeed-lpc-ctrl.c +++ b/drivers/misc/aspeed-lpc-ctrl.c @@ -48,7 +48,7 @@ static int aspeed_lpc_ctrl_mmap(struct file *file, struct vm_area_struct *vma) return -EINVAL; /* ast2400/2500 AHB accesses are not cache coherent */ - prot = pgprot_dmacoherent(prot); + prot = pgprot_noncached(prot); if (remap_pfn_range(vma, vma->vm_start, (lpc_ctrl->mem_base >> PAGE_SHIFT) + vma->vm_pgoff, @@ -229,8 +229,8 @@ static int aspeed_lpc_ctrl_probe(struct platform_device *pdev) if (rc) dev_err(dev, "Unable to register device\n"); else - dev_info(dev, "Loaded at 0x%08x (0x%08x)\n", - lpc_ctrl->mem_base, lpc_ctrl->mem_size); + dev_info(dev, "Loaded at %pap (0x%08x)\n", + &lpc_ctrl->mem_base, lpc_ctrl->mem_size); return rc; } |