mac80211: brcmfmac: backport fixes for 4.7 and 4.8
[openwrt.org/openwrt.git] / package / kernel / mac80211 / patches / 351-0004-brcmfmac-Fix-did-not-remove-int-handler-warning.patch
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From: Christian Daudt <csd@broadcom.com>
Date: Wed, 11 May 2016 15:06:49 -0700
Subject: [PATCH] brcmfmac: Fix 'did not remove int handler' warning
 
brcmf_sdiod_intr_unregister call that removes both func1 and
func2 interrupt handlers only called when brcmf_ops_sdio_remove
is called for func 1 (which is the 2nd call) but sdio is expecting
it to be removed at the end of each sdio_remove call.
This is causing 'rmmod bcmrfmac' on a 4356-sdio chip to complain
with:
WARNING: driver brcmfmac did not remove its interrupt handler!
 
The modification makes calling brcmf_sdiod_intr_unregister multiple
times harmless by clearing the variables that track if interrupt
handlers have been installed, and then calls it on every
brcmf_ops_sdio_remove call instead of just remove for func 1.
 
Signed-off-by: Christian Daudt <csd@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
---
 
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
@@ -172,7 +172,7 @@ int brcmf_sdiod_intr_register(struct brc
        return 0;
 }
 
-int brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev)
+void brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev)
 {
 
        brcmf_dbg(SDIO, "Entering oob=%d sd=%d\n",
@@ -195,6 +195,7 @@ int brcmf_sdiod_intr_unregister(struct b
                }
                free_irq(pdata->oob_irq_nr, &sdiodev->func[1]->dev);
                sdiodev->irq_en = false;
+               sdiodev->oob_irq_requested = false;
        }
 
        if (sdiodev->sd_irq_requested) {
@@ -202,9 +203,8 @@ int brcmf_sdiod_intr_unregister(struct b
                sdio_release_irq(sdiodev->func[2]);
                sdio_release_irq(sdiodev->func[1]);
                sdio_release_host(sdiodev->func[1]);
+               sdiodev->sd_irq_requested = false;
        }
-
-       return 0;
 }
 
 void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev,
@@ -1200,12 +1200,17 @@ static void brcmf_ops_sdio_remove(struct
        brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
        brcmf_dbg(SDIO, "Function: %d\n", func->num);
 
-       if (func->num != 1)
-               return;
-
        bus_if = dev_get_drvdata(&func->dev);
        if (bus_if) {
                sdiodev = bus_if->bus_priv.sdio;
+
+               /* start by unregistering irqs */
+               brcmf_sdiod_intr_unregister(sdiodev);
+
+               if (func->num != 1)
+                       return;
+
+               /* only proceed with rest of cleanup if func 1 */
                brcmf_sdiod_remove(sdiodev);
 
                dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
@@ -294,7 +294,7 @@ struct sdpcmd_regs {
 
 /* Register/deregister interrupt handler. */
 int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev);
-int brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev);
+void brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev);
 
 /* sdio device register access interface */
 u8 brcmf_sdiod_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret);
 
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