[PATCH] dmaengine: pl08x: Use kcalloc() instead of kzalloc()

[Erick Archer]

This is an effort to get rid of all multiplications from allocation
functions in order to prevent integer overflows [1].

Here the multiplication is obviously safe because the "channels"
member can only be 8 or 2. This value is set when the "vendor_data"
structs are initialized.

static struct vendor_data vendor_pl080 = {
        [...]
        .channels = 8,
        [...]
};

static struct vendor_data vendor_nomadik = {
        [...]
        .channels = 8,
        [...]
};

static struct vendor_data vendor_pl080s = {
        [...]
        .channels = 8,
        [...]
};

static struct vendor_data vendor_pl081 = {
        [...]
        .channels = 2,
        [...]
};

However, using kcalloc() is more appropriate [1] and improves
readability. This patch has no effect on runtime behavior.

Link: https://github.com/KSPP/linux/issues/162 [1]
Link: 
https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments
 [1]
Signed-off-by: Erick Archer <erick.arc...@gmx.com>
---
 drivers/dma/amba-pl08x.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index eea8bd33b4b7..e40766108787 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -2855,8 +2855,8 @@ static int pl08x_probe(struct amba_device *adev, const 
struct amba_id *id)
        }

        /* Initialize physical channels */
-       pl08x->phy_chans = kzalloc((vd->channels * sizeof(*pl08x->phy_chans)),
-                       GFP_KERNEL);
+       pl08x->phy_chans = kcalloc(vd->channels, sizeof(*pl08x->phy_chans),
+                                  GFP_KERNEL);
        if (!pl08x->phy_chans) {
                ret = -ENOMEM;
                goto out_no_phychans;
--
2.25.1