[PATCH 3/9] staging: slicoss: ensure mapping of io-memory is uncached

From: Lino Sanfilippo
Date: Fri Jul 22 2016 - 17:10:15 EST


From: Lino Sanfilippo <lsanfil@xxxxxxxxxxx>

Writes to registers should be done uncached for various reasons. Ensure
this by replacing ioremap() with ioremap_nocache().

Signed-off-by: Lino Sanfilippo <LinoSanfilippo@xxxxxx>
---
drivers/staging/slicoss/slicoss.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/slicoss/slicoss.c b/drivers/staging/slicoss/slicoss.c
index a9323a9..4dba080 100644
--- a/drivers/staging/slicoss/slicoss.c
+++ b/drivers/staging/slicoss/slicoss.c
@@ -3136,7 +3136,7 @@ static int slic_entry_probe(struct pci_dev *pcidev,
mmio_start = pci_resource_start(pcidev, 0);
mmio_len = pci_resource_len(pcidev, 0);

- memmapped_ioaddr = ioremap(mmio_start, mmio_len);
+ memmapped_ioaddr = ioremap_nocache(mmio_start, mmio_len);
if (!memmapped_ioaddr) {
dev_err(&pcidev->dev, "cannot remap MMIO region %lx @ %lx\n",
mmio_len, mmio_start);
--
1.9.1