From: Christian Daudt <csd@broadcom.com>
To: linux-wireless@vger.kernel.org
Cc: Christian Daudt <csd@broadcom.com>,
brcm80211-dev-list@broadcom.com,
Brett Rudley <brudley@broadcom.com>,
Arend van Spriel <arend@broadcom.com>,
Franky Lin <frankyl@broadcom.com>,
Hante Meuleman <meuleman@broadcom.com>
Subject: [PATCH v2 2/2] brcmfmac: Fix 'did not remove int handler' warning
Date: Wed, 11 May 2016 15:06:49 -0700 [thread overview]
Message-ID: <1463004409-28885-3-git-send-email-csd@broadcom.com> (raw)
In-Reply-To: <1463004409-28885-1-git-send-email-csd@broadcom.com>
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>
---
.../net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 17 +++++++++++------
drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h | 2 +-
2 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c
index 09635a9..590cd41 100644
--- 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 brcmf_sdio_dev *sdiodev)
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 brcmf_sdio_dev *sdiodev)
}
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 brcmf_sdio_dev *sdiodev)
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 sdio_func *func)
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);
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.h
index c07ad25..f3da32f 100644
--- 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);
--
1.9.1
prev parent reply other threads:[~2016-05-11 22:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-11 22:06 [PATCH v2 0/2] brcmfmac: fixes for some corner cases Christian Daudt
2016-05-11 22:06 ` [PATCH v2 1/2] brcmfmac: Fix kernel oops in failed chip_attach Christian Daudt
2016-06-04 14:59 ` [v2,1/2] " Kalle Valo
2016-05-11 22:06 ` Christian Daudt [this message]
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