From 06f923cbf080e22d1ffccbf3fd2cbab0176f6025 Mon Sep 17 00:00:00 2001
From: Brian King <brking@linux.vnet.ibm.com>
Date: Wed, 13 Jun 2007 17:12:33 -0500
Subject: [PATCH] [SCSI] ibmvscsi: Misc. locking fixes
Fix a couple locking bugs discovered during code inspection.
ibmvscsi_send_srp_event needs to be called with the host lock
held. This patch fixes a couple paths in the code where this
wasn't true.
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
drivers/scsi/ibmvscsi/ibmvscsi.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 0a16972b259972..934bcad39b3b76 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -845,6 +845,7 @@ static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata)
{
struct viosrp_adapter_info *req;
struct srp_event_struct *evt_struct;
+ unsigned long flags;
dma_addr_t addr;
evt_struct = get_event_struct(&hostdata->pool);
@@ -875,6 +876,7 @@ static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata)
return;
}
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
if (ibmvscsi_send_srp_event(evt_struct, hostdata, init_timeout * 2)) {
dev_err(hostdata->dev, "couldn't send ADAPTER_INFO_REQ!\n");
dma_unmap_single(hostdata->dev,
@@ -882,6 +884,7 @@ static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata)
sizeof(hostdata->madapter_info),
DMA_BIDIRECTIONAL);
}
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
};
/**
@@ -1357,6 +1360,7 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata,
{
struct viosrp_host_config *host_config;
struct srp_event_struct *evt_struct;
+ unsigned long flags;
dma_addr_t addr;
int rc;
@@ -1388,7 +1392,9 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata,
}
init_completion(&evt_struct->comp);
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
rc = ibmvscsi_send_srp_event(evt_struct, hostdata, init_timeout * 2);
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
if (rc == 0)
wait_for_completion(&evt_struct->comp);
dma_unmap_single(hostdata->dev, addr, length, DMA_BIDIRECTIONAL);
--
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