From: Dexuan Cui <decui@microsoft.com>
To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
driverdev-devel@linuxdriverproject.org, olaf@aepfle.de,
apw@canonical.com, jasowang@redhat.com, kys@microsoft.com,
vkuznets@redhat.com
Cc: haiyangz@microsoft.com
Subject: [PATCH v2 3/3] hv: vmbus_open(): reset the channel state on ENOMEM
Date: Sun, 1 Feb 2015 20:37:00 -0800 [thread overview]
Message-ID: <1422851820-2432-1-git-send-email-decui@microsoft.com> (raw)
Without this patch, the state is put to CHANNEL_OPENING_STATE, and when
the driver is loaded next time, vmbus_open() will fail immediately due to
newchannel->state != CHANNEL_OPEN_STATE.
CC: "K. Y. Srinivasan" <kys@microsoft.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
---
v2: this is a RESEND.
drivers/hv/channel.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 2978f5e..26dcf26 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -89,9 +89,10 @@ int vmbus_open(struct vmbus_channel *newchannel, u32 send_ringbuffer_size,
out = (void *)__get_free_pages(GFP_KERNEL|__GFP_ZERO,
get_order(send_ringbuffer_size + recv_ringbuffer_size));
- if (!out)
- return -ENOMEM;
-
+ if (!out) {
+ err = -ENOMEM;
+ goto error0;
+ }
in = (void *)((unsigned long)out + send_ringbuffer_size);
@@ -199,6 +200,7 @@ error0:
free_pages((unsigned long)out,
get_order(send_ringbuffer_size + recv_ringbuffer_size));
kfree(open_info);
+ newchannel->state = CHANNEL_OPEN_STATE;
return err;
}
EXPORT_SYMBOL_GPL(vmbus_open);
--
1.9.1
next reply other threads:[~2015-02-02 3:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-02 4:37 Dexuan Cui [this message]
2015-02-02 9:44 ` [PATCH v2 3/3] hv: vmbus_open(): reset the channel state on ENOMEM Jason Wang
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