From 110f4b755e5df82fa4fe54612552dddfe9d58ad5 Mon Sep 17 00:00:00 2001 From: Ajay Singh Date: Tue, 25 Sep 2018 11:53:37 +0530 Subject: [PATCH] staging: wilc1000: avoid use of 'g_spi' static variable Instead of using static variable 'g_spi' move it as part of 'wilc' struct. Also allocating the memory in the probe function and free is taken care in wilc_netdev_cleanup(). Signed-off-by: Ajay Singh Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wilc1000/wilc_spi.c | 58 +++++++++++++++++++++++-------------- 1 file changed, 36 insertions(+), 22 deletions(-) diff --git a/drivers/staging/wilc1000/wilc_spi.c b/drivers/staging/wilc1000/wilc_spi.c index 5517477d875a..2559cf02bff7 100644 --- a/drivers/staging/wilc1000/wilc_spi.c +++ b/drivers/staging/wilc1000/wilc_spi.c @@ -14,7 +14,6 @@ struct wilc_spi { int has_thrpt_enh; }; -static struct wilc_spi g_spi; static const struct wilc_hif_func wilc_hif_spi; /******************************************** @@ -107,6 +106,11 @@ static int wilc_bus_probe(struct spi_device *spi) int ret; struct wilc *wilc; struct gpio_desc *gpio; + struct wilc_spi *spi_priv; + + spi_priv = kzalloc(sizeof(*spi_priv), GFP_KERNEL); + if (!spi_priv) + return -ENOMEM; gpio = gpiod_get(&spi->dev, "irq", GPIOD_IN); if (IS_ERR(gpio)) { @@ -117,11 +121,14 @@ static int wilc_bus_probe(struct spi_device *spi) } ret = wilc_netdev_init(&wilc, NULL, HIF_SPI, &wilc_hif_spi); - if (ret) + if (ret) { + kfree(spi_priv); return ret; + } spi_set_drvdata(spi, wilc); wilc->dev = &spi->dev; + wilc->bus_data = spi_priv; wilc->gpio_irq = gpio; return 0; @@ -275,6 +282,7 @@ static int spi_cmd_complete(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 sz, u8 clockless) { struct spi_device *spi = to_spi_device(wilc->dev); + struct wilc_spi *spi_priv = wilc->bus_data; u8 wb[32], rb[32]; u8 wix, rix; u32 len2; @@ -375,7 +383,7 @@ static int spi_cmd_complete(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 sz, if (result != N_OK) return result; - if (!g_spi.crc_off) + if (!spi_priv->crc_off) wb[len - 1] = (crc7(0x7f, (const u8 *)&wb[0], len - 1)) << 1; else len -= 1; @@ -393,7 +401,7 @@ static int spi_cmd_complete(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 sz, } else if (cmd == CMD_INTERNAL_READ || cmd == CMD_SINGLE_READ) { int tmp = NUM_RSP_BYTES + NUM_DATA_HDR_BYTES + NUM_DATA_BYTES + NUM_DUMMY_BYTES; - if (!g_spi.crc_off) + if (!spi_priv->crc_off) len2 = len + tmp + NUM_CRC_BYTES; else len2 = len + tmp; @@ -485,7 +493,7 @@ static int spi_cmd_complete(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 sz, return N_FAIL; } - if (!g_spi.crc_off) { + if (!spi_priv->crc_off) { /* * Read Crc */ @@ -527,7 +535,7 @@ static int spi_cmd_complete(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 sz, /* * Read Crc */ - if (!g_spi.crc_off && wilc_spi_rx(wilc, crc, 2)) { + if (!spi_priv->crc_off && wilc_spi_rx(wilc, crc, 2)) { dev_err(&spi->dev, "Failed block crc read, bus err\n"); return N_FAIL; @@ -585,7 +593,7 @@ static int spi_cmd_complete(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 sz, /* * Read Crc */ - if (!g_spi.crc_off && wilc_spi_rx(wilc, crc, 2)) { + if (!spi_priv->crc_off && wilc_spi_rx(wilc, crc, 2)) { dev_err(&spi->dev, "Failed block crc read, bus err\n"); result = N_FAIL; @@ -602,6 +610,7 @@ static int spi_cmd_complete(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 sz, static int spi_data_write(struct wilc *wilc, u8 *b, u32 sz) { struct spi_device *spi = to_spi_device(wilc->dev); + struct wilc_spi *spi_priv = wilc->bus_data; int ix, nbytes; int result = 1; u8 cmd, order, crc[2] = {0}; @@ -648,7 +657,7 @@ static int spi_data_write(struct wilc *wilc, u8 *b, u32 sz) /* * Write Crc */ - if (!g_spi.crc_off) { + if (!spi_priv->crc_off) { if (wilc_spi_tx(wilc, crc, 2)) { dev_err(&spi->dev, "Failed data block crc write, bus error...\n"); result = N_FAIL; @@ -816,6 +825,7 @@ static int _wilc_spi_deinit(struct wilc *wilc) static int wilc_spi_init(struct wilc *wilc, bool resume) { struct spi_device *spi = to_spi_device(wilc->dev); + struct wilc_spi *spi_priv = wilc->bus_data; u32 reg; u32 chipid; static int isinit; @@ -828,12 +838,12 @@ static int wilc_spi_init(struct wilc *wilc, bool resume) return 1; } - memset(&g_spi, 0, sizeof(struct wilc_spi)); + memset(spi_priv, 0, sizeof(struct wilc_spi)); /* * configure protocol */ - g_spi.crc_off = 0; + spi_priv->crc_off = 0; /* * TODO: We can remove the CRC trials if there is a definite @@ -845,7 +855,7 @@ static int wilc_spi_init(struct wilc *wilc, bool resume) * Read failed. Try with CRC off. This might happen when module * is removed but chip isn't reset */ - g_spi.crc_off = 1; + spi_priv->crc_off = 1; dev_err(&spi->dev, "Failed read with CRC on, retrying with CRC off\n"); if (!spi_internal_read(wilc, WILC_SPI_PROTOCOL_OFFSET, ®)) { @@ -857,7 +867,7 @@ static int wilc_spi_init(struct wilc *wilc, bool resume) return 0; } } - if (g_spi.crc_off == 0) { + if (spi_priv->crc_off == 0) { reg &= ~0xc; /* disable crc checking */ reg &= ~0x70; reg |= (0x5 << 4); @@ -867,7 +877,7 @@ static int wilc_spi_init(struct wilc *wilc, bool resume) __LINE__); return 0; } - g_spi.crc_off = 1; + spi_priv->crc_off = 1; } /* @@ -878,7 +888,7 @@ static int wilc_spi_init(struct wilc *wilc, bool resume) return 0; } - g_spi.has_thrpt_enh = 1; + spi_priv->has_thrpt_enh = 1; isinit = 1; @@ -888,9 +898,10 @@ static int wilc_spi_init(struct wilc *wilc, bool resume) static int wilc_spi_read_size(struct wilc *wilc, u32 *size) { struct spi_device *spi = to_spi_device(wilc->dev); + struct wilc_spi *spi_priv = wilc->bus_data; int ret; - if (g_spi.has_thrpt_enh) { + if (spi_priv->has_thrpt_enh) { ret = spi_internal_read(wilc, 0xe840 - WILC_SPI_REG_BASE, size); *size = *size & IRQ_DMA_WD_CNT_MASK; @@ -915,6 +926,7 @@ static int wilc_spi_read_size(struct wilc *wilc, u32 *size) static int wilc_spi_read_int(struct wilc *wilc, u32 *int_status) { struct spi_device *spi = to_spi_device(wilc->dev); + struct wilc_spi *spi_priv = wilc->bus_data; int ret; u32 tmp; u32 byte_cnt; @@ -923,7 +935,7 @@ static int wilc_spi_read_int(struct wilc *wilc, u32 *int_status) u32 irq_flags; int k = IRG_FLAGS_OFFSET + 5; - if (g_spi.has_thrpt_enh) { + if (spi_priv->has_thrpt_enh) { ret = spi_internal_read(wilc, 0xe840 - WILC_SPI_REG_BASE, int_status); return ret; @@ -943,12 +955,12 @@ static int wilc_spi_read_int(struct wilc *wilc, u32 *int_status) wilc_spi_read_reg(wilc, 0x1a90, &irq_flags); tmp |= ((irq_flags >> 27) << IRG_FLAGS_OFFSET); - if (g_spi.nint > 5) { + if (spi_priv->nint > 5) { wilc_spi_read_reg(wilc, 0x1a94, &irq_flags); tmp |= (((irq_flags >> 0) & 0x7) << k); } - unknown_mask = ~((1ul << g_spi.nint) - 1); + unknown_mask = ~((1ul << spi_priv->nint) - 1); if ((tmp >> IRG_FLAGS_OFFSET) & unknown_mask) { dev_err(&spi->dev, @@ -968,11 +980,12 @@ static int wilc_spi_read_int(struct wilc *wilc, u32 *int_status) static int wilc_spi_clear_int_ext(struct wilc *wilc, u32 val) { struct spi_device *spi = to_spi_device(wilc->dev); + struct wilc_spi *spi_priv = wilc->bus_data; int ret; u32 flags; u32 tbl_ctl; - if (g_spi.has_thrpt_enh) { + if (spi_priv->has_thrpt_enh) { ret = spi_internal_write(wilc, 0xe844 - WILC_SPI_REG_BASE, val); return ret; @@ -983,7 +996,7 @@ static int wilc_spi_clear_int_ext(struct wilc *wilc, u32 val) int i; ret = 1; - for (i = 0; i < g_spi.nint; i++) { + for (i = 0; i < spi_priv->nint; i++) { /* * No matter what you write 1 or 0, * it will clear interrupt. @@ -1001,7 +1014,7 @@ static int wilc_spi_clear_int_ext(struct wilc *wilc, u32 val) 0x10c8 + i * 4); return ret; } - for (i = g_spi.nint; i < MAX_NUM_INT; i++) { + for (i = spi_priv->nint; i < MAX_NUM_INT; i++) { if (flags & 1) dev_err(&spi->dev, "Unexpected interrupt cleared %d...\n", @@ -1041,6 +1054,7 @@ static int wilc_spi_clear_int_ext(struct wilc *wilc, u32 val) static int wilc_spi_sync_ext(struct wilc *wilc, int nint) { struct spi_device *spi = to_spi_device(wilc->dev); + struct wilc_spi *spi_priv = wilc->bus_data; u32 reg; int ret, i; @@ -1049,7 +1063,7 @@ static int wilc_spi_sync_ext(struct wilc *wilc, int nint) return 0; } - g_spi.nint = nint; + spi_priv->nint = nint; /* * interrupt pin mux select -- 2.11.0