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| author | Arnd Bergmann <arnd@arndb.de> | 2016-12-09 12:44:40 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-12-10 14:57:58 +0100 |
| commit | 190cc65e912de7e8f7ebddcecfbf55a610281a8c (patch) | |
| tree | a4a006248cf123ca3498552213a33daba818f408 /drivers/uio | |
| parent | 2eb72d4b790c0798d077cd69739350e10288dbf1 (diff) | |
| download | linux-stable-190cc65e912de7e8f7ebddcecfbf55a610281a8c.tar.gz linux-stable-190cc65e912de7e8f7ebddcecfbf55a610281a8c.tar.bz2 linux-stable-190cc65e912de7e8f7ebddcecfbf55a610281a8c.zip | |
uio-hv-generic: store physical addresses instead of virtual
gcc warns about the newly added driver when phys_addr_t is wider than
a pointer:
drivers/uio/uio_hv_generic.c: In function 'hv_uio_mmap':
drivers/uio/uio_hv_generic.c:71:17: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
virt_to_phys((void *)info->mem[mi].addr) >> PAGE_SHIFT,
drivers/uio/uio_hv_generic.c: In function 'hv_uio_probe':
drivers/uio/uio_hv_generic.c:140:5: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
= (phys_addr_t)dev->channel->ringbuffer_pages;
drivers/uio/uio_hv_generic.c:147:3: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
(phys_addr_t)vmbus_connection.int_page;
drivers/uio/uio_hv_generic.c:153:3: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
(phys_addr_t)vmbus_connection.monitor_pages[1];
I can't see why we store a virtual address in a phys_addr_t here,
as the only user of that variable converts it into a physical
address anyway, so this moves the conversion to where it logically
fits according to the types.
Fixes: 95096f2fbd10 ("uio-hv-generic: new userspace i/o driver for VMBus")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/uio')
| -rw-r--r-- | drivers/uio/uio_hv_generic.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/uio/uio_hv_generic.c b/drivers/uio/uio_hv_generic.c index ad3ab5805ad8..50958f167305 100644 --- a/drivers/uio/uio_hv_generic.c +++ b/drivers/uio/uio_hv_generic.c @@ -68,7 +68,7 @@ hv_uio_mmap(struct uio_info *info, struct vm_area_struct *vma) mi = (int)vma->vm_pgoff; return remap_pfn_range(vma, vma->vm_start, - virt_to_phys((void *)info->mem[mi].addr) >> PAGE_SHIFT, + info->mem[mi].addr >> PAGE_SHIFT, vma->vm_end - vma->vm_start, vma->vm_page_prot); } @@ -137,20 +137,20 @@ hv_uio_probe(struct hv_device *dev, /* mem resources */ pdata->info.mem[TXRX_RING_MAP].name = "txrx_rings"; pdata->info.mem[TXRX_RING_MAP].addr - = (phys_addr_t)dev->channel->ringbuffer_pages; + = virt_to_phys(dev->channel->ringbuffer_pages); pdata->info.mem[TXRX_RING_MAP].size = dev->channel->ringbuffer_pagecount * PAGE_SIZE; pdata->info.mem[TXRX_RING_MAP].memtype = UIO_MEM_LOGICAL; pdata->info.mem[INT_PAGE_MAP].name = "int_page"; pdata->info.mem[INT_PAGE_MAP].addr = - (phys_addr_t)vmbus_connection.int_page; + virt_to_phys(vmbus_connection.int_page); pdata->info.mem[INT_PAGE_MAP].size = PAGE_SIZE; pdata->info.mem[INT_PAGE_MAP].memtype = UIO_MEM_LOGICAL; pdata->info.mem[MON_PAGE_MAP].name = "monitor_pages"; pdata->info.mem[MON_PAGE_MAP].addr = - (phys_addr_t)vmbus_connection.monitor_pages[1]; + virt_to_phys(vmbus_connection.monitor_pages[1]); pdata->info.mem[MON_PAGE_MAP].size = PAGE_SIZE; pdata->info.mem[MON_PAGE_MAP].memtype = UIO_MEM_LOGICAL; |