linux-kernel - [PATCH 5.10 67/73] Drivers: hv: vmbus: Drop error message when 'No request id available'

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Message-ID: <20240313164640.616049-68-sashal@kernel.org>
Date: Wed, 13 Mar 2024 12:46:34 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: "Andrea Parri (Microsoft)" <parri.andrea@...il.com>,
	Michael Kelley <mikelley@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 67/73] Drivers: hv: vmbus: Drop error message when 'No request id available'

From: "Andrea Parri (Microsoft)" <parri.andrea@...il.com>

[ Upstream commit 0c85c54bf7faeb80c6b76901ed77d93acef0207d ]

Running out of request IDs on a channel essentially produces the same
effect as running out of space in the ring buffer, in that -EAGAIN is
returned.  The error message in hv_ringbuffer_write() should either be
dropped (since we don't output a message when the ring buffer is full)
or be made conditional/debug-only.

Suggested-by: Michael Kelley <mikelley@...rosoft.com>
Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@...il.com>
Fixes: e8b7db38449ac ("Drivers: hv: vmbus: Add vmbus_requestor data structure for VMBus hardening")
Link: https://lore.kernel.org/r/20210301191348.196485-1-parri.andrea@gmail.com
Signed-off-by: Wei Liu <wei.liu@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hv/ring_buffer.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c
index a0ba6ac487368..a49cc69c56af0 100644
--- a/drivers/hv/ring_buffer.c
+++ b/drivers/hv/ring_buffer.c
@@ -326,7 +326,6 @@ int hv_ringbuffer_write(struct vmbus_channel *channel,
 		rqst_id = vmbus_next_request_id(&channel->requestor, requestid);
 		if (rqst_id == VMBUS_RQST_ERROR) {
 			spin_unlock_irqrestore(&outring_info->ring_lock, flags);
-			pr_err("No request id available\n");
 			return -EAGAIN;
 		}
 	}
-- 
2.43.0