staging: brcm80211: removed global variable from sdio fullmac

Code cleanup. bus->card is assigned in brcmf_sdbrcm_probe (before
brcmf_sdbrcm_probe_attach()). Since w_sdreg32() and r_sdreg32() are called
only after that assignment, they can safely use bus->card. Thus there
is no instance left where brcmf_sdcard_reg_read() or brcmf_sdcard_reg_write()
is called with a NULL parameter, so the mechanism in bcmsdh.c that deals with
a NULL pointer could be deleted.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/brcm80211/brcmfmac/bcmsdh.c b/drivers/staging/brcm80211/brcmfmac/bcmsdh.c
index fb3ab63..916d41f 100644 (file)
--- a/drivers/staging/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/staging/brcm80211/brcmfmac/bcmsdh.c
@@ -89,9 +89,6 @@ struct sdio_hc {
        bool oob_irq_registered;
 };
 
-/* local copy of bcm sd handler */
-static struct brcmf_sdio_card *l_card;
-
 const uint brcmf_sdio_msglevel = BRCMF_SD_ERROR_VAL;
 
 static struct sdio_hc *sdhcinfo;
@@ -116,9 +113,6 @@ brcmf_sdcard_attach(void *cfghdl, u32 *regsva, uint irq)
                return NULL;
        }
 
-       /* save the handler locally */
-       l_card = card;
-
        card->sdioh = brcmf_sdioh_attach(cfghdl, irq);
        if (!card->sdioh) {
                brcmf_sdcard_detach(card);
@@ -144,7 +138,6 @@ int brcmf_sdcard_detach(struct brcmf_sdio_card *card)
                kfree(card);
        }
 
-       l_card = NULL;
        return 0;
 }
 
@@ -184,9 +177,6 @@ u8 brcmf_sdcard_cfg_read(struct brcmf_sdio_card *card, uint fnc_num, u32 addr,
        s32 retry = 0;
        u8 data = 0;
 
-       if (!card)
-               card = l_card;
-
        do {
                if (retry)      /* wait for 1 ms till bus get settled down */
                        udelay(1000);
@@ -211,9 +201,6 @@ brcmf_sdcard_cfg_write(struct brcmf_sdio_card *card, uint fnc_num, u32 addr,
        int status;
        s32 retry = 0;
 
-       if (!card)
-               card = l_card;
-
        do {
                if (retry)      /* wait for 1 ms till bus get settled down */
                        udelay(1000);
@@ -235,9 +222,6 @@ u32 brcmf_sdcard_cfg_read_word(struct brcmf_sdio_card *card, uint fnc_num,
        int status;
        u32 data = 0;
 
-       if (!card)
-               card = l_card;
-
        status = brcmf_sdioh_request_word(card->sdioh, SDIOH_CMD_TYPE_NORMAL,
                SDIOH_READ, fnc_num, addr, &data, 4);
 
@@ -256,9 +240,6 @@ brcmf_sdcard_cfg_write_word(struct brcmf_sdio_card *card, uint fnc_num,
 {
        int status;
 
-       if (!card)
-               card = l_card;
-
        status =
            brcmf_sdioh_request_word(card->sdioh, SDIOH_CMD_TYPE_NORMAL,
                               SDIOH_WRITE, fnc_num, addr, &data, 4);
@@ -280,9 +261,6 @@ int brcmf_sdcard_cis_read(struct brcmf_sdio_card *card, uint func, u8 * cis,
        bool ascii = func & ~0xf;
        func &= 0x7;
 
-       if (!card)
-               card = l_card;
-
        status = brcmf_sdioh_cis_read(card->sdioh, func, cis, length);
 
        if (ascii) {
@@ -334,9 +312,6 @@ u32 brcmf_sdcard_reg_read(struct brcmf_sdio_card *card, u32 addr, uint size)
 
        BRCMF_SD_INFO(("%s:fun = 1, addr = 0x%x, ", __func__, addr));
 
-       if (!card)
-               card = l_card;
-
        if (bar0 != card->sbwad) {
                if (brcmf_sdcard_set_sbaddr_window(card, bar0))
                        return 0xFFFFFFFF;
@@ -386,9 +361,6 @@ u32 brcmf_sdcard_reg_write(struct brcmf_sdio_card *card, u32 addr, uint size,
        BRCMF_SD_INFO(("%s:fun = 1, addr = 0x%x, uint%ddata = 0x%x\n",
                     __func__, addr, size * 8, data));
 
-       if (!card)
-               card = l_card;
-
        if (bar0 != card->sbwad) {
                err = brcmf_sdcard_set_sbaddr_window(card, bar0);
                if (err)
@@ -522,9 +494,6 @@ int brcmf_sdcard_query_device(struct brcmf_sdio_card *card)
 
 u32 brcmf_sdcard_cur_sbwad(struct brcmf_sdio_card *card)
 {
-       if (!card)
-               card = l_card;
-
        return card->sbwad;
 }
 

diff --git a/drivers/staging/brcm80211/brcmfmac/dhd_sdio.c b/drivers/staging/brcm80211/brcmfmac/dhd_sdio.c
index 27a6937..d02bcc7 100644 (file)
--- a/drivers/staging/brcm80211/brcmfmac/dhd_sdio.c
+++ b/drivers/staging/brcm80211/brcmfmac/dhd_sdio.c
@@ -889,7 +889,7 @@ r_sdreg32(struct brcmf_bus *bus, u32 *regvar, u32 reg_offset, u32 *retryvar)
 {
        *retryvar = 0;
        do {
-               *regvar = brcmf_sdcard_reg_read(NULL,
+               *regvar = brcmf_sdcard_reg_read(bus->card,
                                bus->ci->buscorebase + reg_offset, sizeof(u32));
        } while (brcmf_sdcard_regfail(bus->card) &&
                 (++(*retryvar) <= retry_limit));
@@ -907,7 +907,8 @@ w_sdreg32(struct brcmf_bus *bus, u32 regval, u32 reg_offset, u32 *retryvar)
 {
        *retryvar = 0;
        do {
-               brcmf_sdcard_reg_write(NULL, bus->ci->buscorebase + reg_offset,
+               brcmf_sdcard_reg_write(bus->card,
+                                      bus->ci->buscorebase + reg_offset,
                                       sizeof(u32), regval);
        } while (brcmf_sdcard_regfail(bus->card) &&
                 (++(*retryvar) <= retry_limit));
@@ -5682,8 +5683,8 @@ brcmf_sdbrcm_probe_attach(struct brcmf_bus *bus, void *card, u32 regsva,
        /* Set core control so an SDIO reset does a backplane reset */
        reg_addr = bus->ci->buscorebase +
                   offsetof(struct sdpcmd_regs, corecontrol);
-       reg_val = brcmf_sdcard_reg_read(NULL, reg_addr, sizeof(u32));
-       brcmf_sdcard_reg_write(NULL, reg_addr, sizeof(u32),
+       reg_val = brcmf_sdcard_reg_read(bus->card, reg_addr, sizeof(u32));
+       brcmf_sdcard_reg_write(bus->card, reg_addr, sizeof(u32),
                               reg_val | CC_BPRESEN);
 
        brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);