static void dw_writer(struct dw_spi *dws)
{
- u32 max = tx_max(dws);
+ u32 max;
u16 txw = 0;
+ spin_lock(&dws->buf_lock);
+ max = tx_max(dws);
while (max--) {
/* Set the tx word if the transfer's original "tx" is not null */
if (dws->tx_end - dws->len) {
dw_write_io_reg(dws, DW_SPI_DR, txw);
dws->tx += dws->n_bytes;
}
+ spin_unlock(&dws->buf_lock);
}
static void dw_reader(struct dw_spi *dws)
{
- u32 max = rx_max(dws);
+ u32 max;
u16 rxw;
+ spin_lock(&dws->buf_lock);
+ max = rx_max(dws);
while (max--) {
rxw = dw_read_io_reg(dws, DW_SPI_DR);
/* Care rx only if the transfer's original "rx" is not null */
}
dws->rx += dws->n_bytes;
}
+ spin_unlock(&dws->buf_lock);
}
static void int_error_stop(struct dw_spi *dws, const char *msg)
{
struct dw_spi *dws = spi_master_get_devdata(master);
struct chip_data *chip = spi_get_ctldata(spi);
+ unsigned long flags;
u8 imask = 0;
u16 txlevel = 0;
u32 cr0;
int ret;
dws->dma_mapped = 0;
-
+ spin_lock_irqsave(&dws->buf_lock, flags);
dws->tx = (void *)transfer->tx_buf;
dws->tx_end = dws->tx + transfer->len;
dws->rx = transfer->rx_buf;
dws->rx_end = dws->rx + transfer->len;
dws->len = transfer->len;
+ spin_unlock_irqrestore(&dws->buf_lock, flags);
spi_enable_chip(dws, 0);
dws->dma_inited = 0;
dws->dma_addr = (dma_addr_t)(dws->paddr + DW_SPI_DR);
snprintf(dws->name, sizeof(dws->name), "dw_spi%d", dws->bus_num);
+ spin_lock_init(&dws->buf_lock);
ret = request_irq(dws->irq, dw_spi_irq, IRQF_SHARED, dws->name, master);
if (ret < 0) {