[PATCH 22/48] ARM: PL08x: use 'size_t' for lengths
Russell King - ARM Linux
linux at arm.linux.org.uk
Mon Jan 3 17:37:31 EST 2011
Use size_t for variables denoting lengths throughout, and use the 'z'
qualifier for printing the value. For safety, add a BUG_ON() in
pl08x_fill_lli_for_desc() to catch the remainder potentially becoming
negative.
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
drivers/dma/amba-pl08x.c | 40 +++++++++++++++++-----------------------
include/linux/amba/pl08x.h | 4 ++--
2 files changed, 19 insertions(+), 25 deletions(-)
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 760b71e..fa78697 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -342,7 +342,7 @@ static u32 pl08x_getbytes_chan(struct pl08x_dma_chan *plchan)
struct pl08x_txd *txdi = NULL;
struct pl08x_txd *txd;
unsigned long flags;
- u32 bytes = 0;
+ size_t bytes = 0;
spin_lock_irqsave(&plchan->lock, flags);
@@ -470,7 +470,7 @@ static inline unsigned int pl08x_get_bytes_for_cctl(unsigned int coded)
}
static inline u32 pl08x_cctl_bits(u32 cctl, u8 srcwidth, u8 dstwidth,
- u32 tsize)
+ size_t tsize)
{
u32 retbits = cctl;
@@ -583,6 +583,8 @@ static int pl08x_fill_lli_for_desc(struct pl08x_driver_data *pl08x,
if (cctl & PL080_CONTROL_DST_INCR)
txd->dstbus.addr += len;
+ BUG_ON(*remainder < len);
+
*remainder -= len;
return num_llis + 1;
@@ -591,7 +593,7 @@ static int pl08x_fill_lli_for_desc(struct pl08x_driver_data *pl08x,
/*
* Return number of bytes to fill to boundary, or len
*/
-static inline u32 pl08x_pre_boundary(u32 addr, u32 len)
+static inline size_t pl08x_pre_boundary(u32 addr, size_t len)
{
u32 boundary;
@@ -614,11 +616,11 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
{
struct pl08x_channel_data *cd = txd->cd;
struct pl08x_bus_data *mbus, *sbus;
- u32 remainder;
+ size_t remainder;
int num_llis = 0;
u32 cctl;
- int max_bytes_per_lli;
- int total_bytes = 0;
+ size_t max_bytes_per_lli;
+ size_t total_bytes = 0;
struct pl08x_lli *llis_va;
txd->llis_va = dma_pool_alloc(pl08x->pool, GFP_NOWAIT,
@@ -686,13 +688,13 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
max_bytes_per_lli = min(txd->srcbus.buswidth, txd->dstbus.buswidth) *
PL080_CONTROL_TRANSFER_SIZE_MASK;
dev_vdbg(&pl08x->adev->dev,
- "%s max bytes per lli = %d\n",
+ "%s max bytes per lli = %zu\n",
__func__, max_bytes_per_lli);
/* We need to count this down to zero */
remainder = txd->len;
dev_vdbg(&pl08x->adev->dev,
- "%s remainder = %d\n",
+ "%s remainder = %zu\n",
__func__, remainder);
/*
@@ -760,9 +762,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
* width left
*/
while (remainder > (mbus->buswidth - 1)) {
- int lli_len, target_len;
- int tsize;
- int odd_bytes;
+ size_t lli_len, target_len, tsize, odd_bytes;
/*
* If enough left try to send max possible,
@@ -805,7 +805,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
if (lli_len <= 0) {
dev_err(&pl08x->adev->dev,
- "%s lli_len is %d, <= 0\n",
+ "%s lli_len is %zu, <= 0\n",
__func__, lli_len);
return 0;
}
@@ -853,7 +853,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
if (target_len != lli_len) {
dev_vdbg(&pl08x->adev->dev,
- "%s can't send what we want. Desired 0x%08x, lli of 0x%08x bytes in txd of 0x%08x\n",
+ "%s can't send what we want. Desired 0x%08zx, lli of 0x%08zx bytes in txd of 0x%08zx\n",
__func__, target_len, lli_len, txd->len);
}
@@ -863,7 +863,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
tsize);
dev_vdbg(&pl08x->adev->dev,
- "%s fill lli with single lli chunk of size 0x%08x (remainder 0x%08x)\n",
+ "%s fill lli with single lli chunk of size 0x%08zx (remainder 0x%08zx)\n",
__func__, lli_len, remainder);
num_llis = pl08x_fill_lli_for_desc(pl08x, txd,
num_llis, lli_len, cctl,
@@ -882,7 +882,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
&& (remainder); j++) {
cctl = pl08x_cctl_bits(cctl, 1, 1, 1);
dev_vdbg(&pl08x->adev->dev,
- "%s align with boundary, single byte (remain 0x%08x)\n",
+ "%s align with boundary, single byte (remain 0x%08zx)\n",
__func__, remainder);
num_llis =
pl08x_fill_lli_for_desc(pl08x,
@@ -896,16 +896,10 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
/*
* Send any odd bytes
*/
- if (remainder < 0) {
- dev_err(&pl08x->adev->dev, "%s remainder not fitted 0x%08x bytes\n",
- __func__, remainder);
- return 0;
- }
-
while (remainder) {
cctl = pl08x_cctl_bits(cctl, 1, 1, 1);
dev_vdbg(&pl08x->adev->dev,
- "%s align with boundary, single odd byte (remain %d)\n",
+ "%s align with boundary, single odd byte (remain %zu)\n",
__func__, remainder);
num_llis = pl08x_fill_lli_for_desc(pl08x, txd, num_llis,
1, cctl, &remainder);
@@ -914,7 +908,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
}
if (total_bytes != txd->len) {
dev_err(&pl08x->adev->dev,
- "%s size of encoded lli:s don't match total txd, transferred 0x%08x from size 0x%08x\n",
+ "%s size of encoded lli:s don't match total txd, transferred 0x%08zx from size 0x%08zx\n",
__func__, total_bytes, txd->len);
return 0;
}
diff --git a/include/linux/amba/pl08x.h b/include/linux/amba/pl08x.h
index 3ecc20f..2c834ed 100644
--- a/include/linux/amba/pl08x.h
+++ b/include/linux/amba/pl08x.h
@@ -77,7 +77,7 @@ struct pl08x_bus_data {
dma_addr_t addr;
u8 maxwidth;
u8 buswidth;
- u32 fill_bytes;
+ size_t fill_bytes;
};
/**
@@ -113,7 +113,7 @@ struct pl08x_txd {
enum dma_data_direction direction;
struct pl08x_bus_data srcbus;
struct pl08x_bus_data dstbus;
- int len;
+ size_t len;
dma_addr_t llis_bus;
void *llis_va;
struct pl08x_channel_data *cd;
--
1.6.2.5
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