@@ -795,14 +795,13 @@ static void msdc_unprepare_data(struct msdc_host *host, struct mmc_data *data)
static u64 msdc_timeout_cal(struct msdc_host *host, u64 ns, u64 clks)
{
struct mmc_host *mmc = mmc_from_priv(host);
- u64 timeout, clk_ns;
- u32 mode = 0;
+ u64 timeout;
+ u32 clk_ns, mode = 0;
if (mmc->actual_clock == 0) {
timeout = 0;
} else {
- clk_ns = 1000000000ULL;
- do_div(clk_ns, mmc->actual_clock);
+ clk_ns = 1000000000U / mmc->actual_clock;
timeout = ns + clk_ns - 1;
do_div(timeout, clk_ns);
timeout += clks;
@@ -831,7 +830,7 @@ static void msdc_set_timeout(struct msdc_host *host, u64 ns, u64 clks)
timeout = msdc_timeout_cal(host, ns, clks);
sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC,
- (u32)(timeout > 255 ? 255 : timeout));
+ max_t(u32, timeout, 255));
}
static void msdc_set_busy_timeout(struct msdc_host *host, u64 ns, u64 clks)
@@ -840,7 +839,7 @@ static void msdc_set_busy_timeout(struct msdc_host *host, u64 ns, u64 clks)
timeout = msdc_timeout_cal(host, ns, clks);
sdr_set_field(host->base + SDC_CFG, SDC_CFG_WRDTOC,
- (u32)(timeout > 8191 ? 8191 : timeout));
+ max_t(u32, timeout, 8191));
}
static void msdc_gate_clock(struct msdc_host *host)
The local variable clk_ns uses at most 32 bits and can be a u32. Replace the 64-by-32 do_div() division with a standard divison. Since do_div() casts the divisor to u32 anyway, changing the data type of clk_ns to u32 also removes the following Coccinelle/coccicheck warning reported by do_div.cocci: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead Use max_t(u32,,) to simplify the code and improve its readability. Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com> --- Changes in v2: - Address kernel test robot feedback and replace do_div() with a standard division - Link to v1: https://lore.kernel.org/linux-kernel/20240815234602.59684-1-thorsten.blum@toblux.com/ --- drivers/mmc/host/mtk-sd.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-)