From: Amitkumar Karwar <akarwar@marvell.com>
To: <linux-wireless@vger.kernel.org>
Cc: Cathy Luo <cluo@marvell.com>,
Nishant Sarmukadam <nishants@marvell.com>, <rajatja@google.com>,
<briannorris@google.com>, Xinming Hu <huxm@marvell.com>,
Amitkumar Karwar <akarwar@marvell.com>
Subject: [PATCH v3 1/3] mwifiex: reset card->adapter during device unregister
Date: Thu, 6 Oct 2016 23:00:26 +0530 [thread overview]
Message-ID: <1475775028-20306-1-git-send-email-akarwar@marvell.com> (raw)
From: Xinming Hu <huxm@marvell.com>
card->adapter gets initialized during device registration.
As it's not cleared, we may end up accessing invalid memory
in some corner cases. This patch fixes the problem.
Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
---
v3: Same as v1 and v2
---
drivers/net/wireless/marvell/mwifiex/pcie.c | 1 +
drivers/net/wireless/marvell/mwifiex/sdio.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c
index f1eeb73..ba9e068 100644
--- a/drivers/net/wireless/marvell/mwifiex/pcie.c
+++ b/drivers/net/wireless/marvell/mwifiex/pcie.c
@@ -3042,6 +3042,7 @@ static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
pci_disable_msi(pdev);
}
}
+ card->adapter = NULL;
}
/* This function initializes the PCI-E host memory space, WCB rings, etc.
diff --git a/drivers/net/wireless/marvell/mwifiex/sdio.c b/drivers/net/wireless/marvell/mwifiex/sdio.c
index 8718950..4cad1c2 100644
--- a/drivers/net/wireless/marvell/mwifiex/sdio.c
+++ b/drivers/net/wireless/marvell/mwifiex/sdio.c
@@ -2066,6 +2066,7 @@ mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
struct sdio_mmc_card *card = adapter->card;
if (adapter->card) {
+ card->adapter = NULL;
sdio_claim_host(card->func);
sdio_disable_func(card->func);
sdio_release_host(card->func);
--
1.9.1
next reply other threads:[~2016-10-06 17:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-06 17:30 Amitkumar Karwar [this message]
2016-10-06 17:30 ` [PATCH v3 2/3] mwifiex: remove redundant pdev check in suspend/resume handlers Amitkumar Karwar
2016-10-06 17:30 ` [PATCH v3 3/3] mwifiex: check hw_status in suspend and resume handlers Amitkumar Karwar
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