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Date: Fri, 11 Aug 2017 15:12:05 -0700 (PDT)
From: David Miller <davem@...emloft.net>
To: Bryan.Whitehead@...rochip.com
Cc: netdev@...r.kernel.org, UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH net-next 1/3] Add LAN743X driver
From: <Bryan.Whitehead@...rochip.com>
Date: Fri, 11 Aug 2017 19:47:57 +0000
> +static int lan743x_pci_init(struct lan743x_adapter *adapter,
> + struct pci_dev *pdev)
> +{
> + int ret = -ENODEV;
> + int bars = 0;
> + struct lan743x_pci *pci = &adapter->pci;
Please always order local variable declarations from longest to shortest
line (reverse christmas tree format).
> + pci_set_master(pdev);
> +
> +clean_up:
> + if (ret) {
It is more intuitive to structure this like:
return 0;
clean_up:
...
> +static u8 __iomem *lan743x_pci_get_bar_address(struct lan743x_adapter *adapter,
> + int bar_index)
> +{
> + u8 __iomem *result = NULL;
> + struct lan743x_pci *pci = &adapter->pci;
Reverse christmas tree ordering please.
> +static int lan743x_csr_light_reset(struct lan743x_adapter *adapter)
> +{
> + int result = -EIO;
> + u32 data;
> + unsigned long timeout;
Likewise.
> +static inline void lan743x_csr_write(
> + struct lan743x_adapter *adapter, int offset, u32 data)
Don't do the argument formatting like this please, it looks terrible.
This:
static inline void lan743x_csr_write(struct lan743x_adapter *adapter,
int offset, u32 data)
works much better.
> +static void lan743x_intr_union_isr(void *context, u32 int_sts)
> +{
> + struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
Casts from void pointers are never necessary, that's the whole point of
void pointers. Please remove this cast.
> +static irqreturn_t lan743x_vector_isr(int irq, void *ptr)
> +{
> + irqreturn_t result = IRQ_NONE;
> + struct lan743x_vector *vector = (struct lan743x_vector *)ptr;
> + struct lan743x_adapter *adapter = NULL;
> + u32 int_sts;
> + u32 mask;
Reverse christmas tree ordering please.
> +static int lan743x_intr_open(struct lan743x_adapter *adapter)
> +{
> + int ret = -ENODEV;
> + struct lan743x_intr *intr = &adapter->intr;
> + int index = 0;
Likewise.
> +static int lan743x_dp_wait_till_not_busy(struct lan743x_adapter *adapter)
> +{
> + int i;
> + u32 dp_sel = 0;
Likewise.
> +static int lan743x_dp_write(struct lan743x_adapter *adapter,
> + u32 select, u32 addr, u32 length, u32 *buf)
> +{
> + struct lan743x_dp *dp = &adapter->dp;
> + int ret = -EIO;
> + int i;
> + u32 dp_sel;
Likewise.
> +#ifdef CONFIG_PTP_1588_CLOCK
> +static int lan743x_gpio_reserve_ptp_output(struct lan743x_adapter *adapter,
> + int bit, int ptp_channel)
> +{
> + struct lan743x_gpio *gpio = &adapter->gpio;
> + int ret = -EBUSY;
> + unsigned long irq_flags = 0;
> + int bit_mask = BIT(bit);
Likewise.
> +#ifdef CONFIG_PTP_1588_CLOCK
> +static int lan743x_ptpci_adjfreq(struct ptp_clock_info *ptpci, s32 delta_ppb)
> +{
> + u32 u32_delta = 0;
> + u64 u64_delta = 0;
> + u32 lan743x_rate_adj = 0;
> + bool positive = true;
> + struct lan743x_ptp *ptp = LAN743X_PTPCI_TO_PTP;
> + struct lan743x_adapter *adapter = LAN743X_PTP_TO_ADAPTER;
Likewise.
> +#ifdef CONFIG_PTP_1588_CLOCK
> +static int lan743x_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta)
> +{
> + struct lan743x_ptp *ptp = LAN743X_PTPCI_TO_PTP;
> + struct lan743x_adapter *adapter = LAN743X_PTP_TO_ADAPTER;
Likewise.
> +#ifdef CONFIG_PTP_1588_CLOCK
> +static int lan743x_ptpci_gettime64(struct ptp_clock_info *ptpci,
> + struct timespec64 *ts)
> +{
> + struct lan743x_ptp *ptp = LAN743X_PTPCI_TO_PTP;
> + struct lan743x_adapter *adapter = LAN743X_PTP_TO_ADAPTER;
Likewise.
> +#ifdef CONFIG_PTP_1588_CLOCK
> +static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci,
> + const struct timespec64 *ts)
> +{
> + struct lan743x_ptp *ptp = LAN743X_PTPCI_TO_PTP;
> + struct lan743x_adapter *adapter = LAN743X_PTP_TO_ADAPTER;
Likewise.
Also, these X_TO_Y macros are terrible. If you aren an accessor like
that, make it a nice inline function declared in a header file with
lowercase letter which actually does type checking on the pointer
variable which is dereferenced.
> + if (ts) {
> + u32 seconds = 0;
> + u32 nano_seconds = 0;
Reverse christmas tree ordering please.
> +#ifdef CONFIG_PTP_1588_CLOCK
> +static int lan743x_ptp_enable_pps(struct lan743x_adapter *adapter)
> +{
> + struct lan743x_ptp *ptp = &adapter->ptp;
> + int result = -ENODEV;
> + u32 current_seconds = 0;
> + u32 target_seconds = 0;
> + u32 general_config = 0;
Likewise.
> +static void lan743x_ptp_isr(void *context)
> +{
> + int enable_flag = 1;
> + u32 ptp_int_sts = 0;
> + struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
> + struct lan743x_ptp *ptp = NULL;
Likewise. And again please remove the void pointer cast.
> +#ifdef CONFIG_PTP_1588_CLOCK
> +static int lan743x_ptp_reserve_event_ch(struct lan743x_adapter *adapter)
> +{
> + struct lan743x_ptp *ptp = &adapter->ptp;
> + int index = 0;
> + int result = -ENODEV;
Likewise.
> +#ifdef CONFIG_PTP_1588_CLOCK
> +static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
> + s64 time_step_ns)
> +{
> + struct lan743x_ptp *ptp = &adapter->ptp;
> + u64 abs_time_step_ns = 0;
> + s32 seconds = 0;
> + u32 nano_seconds = 0;
Likewise.
This thing is huge, I'm not reviewing any more of this enormous submission.
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