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media: intel-ipu3: cio2: fix building with large PAGE_SIZE 

The driver apparently assumes that the device uses the same page size
as the CPU, but also assumes that this is 4096 bytes. On architectures
with a larger page size like 65536 bytes, we get a warning about an
integer overflow:

drivers/media/pci/intel/ipu3/ipu3-cio2.c: In function 'cio2_fbpt_entry_init_dummy':
arch/arm64/include/asm/page-def.h:28:20: error: large integer implicitly truncated to unsigned type [-Werror=overflow]
 #define PAGE_SIZE  (_AC(1, UL) << PAGE_SHIFT)
                    ^
drivers/media/pci/intel/ipu3/ipu3-cio2.h:404:26: note: in expansion of macro 'PAGE_SIZE'
 #define CIO2_PAGE_SIZE   PAGE_SIZE
                          ^~~~~~~~~
drivers/media/pci/intel/ipu3/ipu3-cio2.c:172:3: note: in expansion of macro 'CIO2_PAGE_SIZE'
   CIO2_PAGE_SIZE / sizeof(u32) * CIO2_MAX_LOPS;

Obviously this won't work, but the driver is also unlikely to ever be
used on such an architecture, so the easiest workaround is to define
the CIO2_PAGE_SIZE macro to the size that the hardware actually uses.

Fixes: c2a6a07afe ("media: intel-ipu3: cio2: add new MIPI-CSI2 driver")

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Arnd Bergmann 2018-01-03 17:35:31 -05:00 committed by Mauro Carvalho Chehab
parent 2086dd3570
commit 883dd4c1b8
1 changed files with 1 additions and 1 deletions
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2
drivers/media/pci/intel/ipu3/ipu3-cio2.h
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@ -401,7 +401,7 @@ struct cio2_device {
sizeof(struct cio2_fbpt_entry)) sizeof(struct cio2_fbpt_entry))
#define CIO2_FBPT_SUBENTRY_UNIT 4 #define CIO2_FBPT_SUBENTRY_UNIT 4
#define CIO2_PAGE_SIZE PAGE_SIZE #define CIO2_PAGE_SIZE 4096
/* cio2 fbpt first_entry ctrl status */ /* cio2 fbpt first_entry ctrl status */
#define CIO2_FBPT_CTRL_VALID BIT(0) #define CIO2_FBPT_CTRL_VALID BIT(0)