mtd: st_spi_fsm: correct type issues
Compile-testing for a 64-bit arch uncovers several bad casts:
In file included from include/linux/linkage.h:4:0,
from include/linux/kernel.h:6,
from drivers/mtd/devices/st_spi_fsm.c:15:
drivers/mtd/devices/st_spi_fsm.c: In function ‘stfsm_read_fifo’:
drivers/mtd/devices/st_spi_fsm.c:758:11: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
BUG_ON((((uint32_t)buf) & 0x3) || (size & 0x3));
...
Use uintptr_t instead of uint32_t, since it's guaranteed to be
pointer-sized.
We also see this warning, if size_t is not 32 bits wide:
In file included from drivers/mtd/devices/st_spi_fsm.c:15:0:
drivers/mtd/devices/st_spi_fsm.c: In function ‘stfsm_mtd_write’:
include/linux/kernel.h:712:17: warning: comparison of distinct pointer types lacks a cast [enabled by default]
(void) (&_min1 == &_min2); \
^
drivers/mtd/devices/st_spi_fsm.c:1704:11: note: in expansion of macro ‘min’
bytes = min(FLASH_PAGESIZE - page_offs, len);
^
Just use min_t() to force the type conversion, since we don't really
want to upgrade 'page_offs' and 'bytes' to size_t; they only should be
handling <= 256 byte offsets.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 7cc49ba..f97fe14 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -755,7 +755,7 @@
dev_dbg(fsm->dev, "Reading %d bytes from FIFO\n", size);
- BUG_ON((((uint32_t)buf) & 0x3) || (size & 0x3));
+ BUG_ON((((uintptr_t)buf) & 0x3) || (size & 0x3));
while (remaining) {
for (;;) {
@@ -779,7 +779,7 @@
dev_dbg(fsm->dev, "writing %d bytes to FIFO\n", size);
- BUG_ON((((uint32_t)buf) & 0x3) || (size & 0x3));
+ BUG_ON((((uintptr_t)buf) & 0x3) || (size & 0x3));
writesl(fsm->base + SPI_FAST_SEQ_DATA_REG, buf, words);
@@ -1474,7 +1474,7 @@
read_mask = (data_pads << 2) - 1;
/* Handle non-aligned buf */
- p = ((uint32_t)buf & 0x3) ? (uint8_t *)page_buf : buf;
+ p = ((uintptr_t)buf & 0x3) ? (uint8_t *)page_buf : buf;
/* Handle non-aligned size */
size_ub = (size + read_mask) & ~read_mask;
@@ -1496,7 +1496,7 @@
}
/* Handle non-aligned buf */
- if ((uint32_t)buf & 0x3)
+ if ((uintptr_t)buf & 0x3)
memcpy(buf, page_buf, size);
/* Wait for sequence to finish */
@@ -1538,7 +1538,7 @@
write_mask = (data_pads << 2) - 1;
/* Handle non-aligned buf */
- if ((uint32_t)buf & 0x3) {
+ if ((uintptr_t)buf & 0x3) {
memcpy(page_buf, buf, size);
p = (uint8_t *)page_buf;
} else {
@@ -1701,7 +1701,7 @@
while (len) {
/* Write up to page boundary */
- bytes = min(FLASH_PAGESIZE - page_offs, len);
+ bytes = min_t(size_t, FLASH_PAGESIZE - page_offs, len);
ret = stfsm_write(fsm, b, bytes, to);
if (ret)
