@@ -347,7 +347,7 @@ static int mthca_cmd_poll(struct mthca_dev *dev,
unsigned long end;
u8 status;
- down(&dev->cmd.poll_sem);
+ mutex_lock(&dev->cmd.poll_mutex);
err = mthca_cmd_post(dev, in_param,
out_param ? *out_param : 0,
@@ -382,7 +382,7 @@ static int mthca_cmd_poll(struct mthca_dev *dev,
}
out:
- up(&dev->cmd.poll_sem);
+ mutex_unlock(&dev->cmd.poll_mutex);
return err;
}
@@ -520,7 +520,7 @@ static int mthca_cmd_imm(struct mthca_dev *dev,
int mthca_cmd_init(struct mthca_dev *dev)
{
mutex_init(&dev->cmd.hcr_mutex);
- sema_init(&dev->cmd.poll_sem, 1);
+ mutex_init(&dev->cmd.poll_mutex);
dev->cmd.flags = 0;
dev->hcr = ioremap(pci_resource_start(dev->pdev, 0) + MTHCA_HCR_BASE,
@@ -582,8 +582,6 @@ int mthca_cmd_use_events(struct mthca_dev *dev)
dev->cmd.flags |= MTHCA_CMD_USE_EVENTS;
- down(&dev->cmd.poll_sem);
-
return 0;
}
@@ -600,8 +598,6 @@ void mthca_cmd_use_polling(struct mthca_dev *dev)
down(&dev->cmd.event_sem);
kfree(dev->cmd.context);
-
- up(&dev->cmd.poll_sem);
}
struct mthca_mailbox *mthca_alloc_mailbox(struct mthca_dev *dev,
@@ -35,6 +35,7 @@
#ifndef MTHCA_CMD_H
#define MTHCA_CMD_H
+#include <linux/mutex.h>
#include <rdma/ib_verbs.h>
#define MTHCA_MAILBOX_SIZE 4096
@@ -120,7 +120,7 @@ enum {
struct mthca_cmd {
struct pci_pool *pool;
struct mutex hcr_mutex;
- struct semaphore poll_sem;
+ struct mutex poll_mutex;
struct semaphore event_sem;
int max_cmds;
spinlock_t context_lock;
The semaphore 'poll_sem' is a simple mutex, so it should be written as one. Semaphores are going away in the future. So replace it with a mutex. Also, remove mutex_[un]lock from mthca_cmd_use_events and mthca_cmd_use_polling respectively. Signed-off-by: Binoy Jayan <binoy.jayan@linaro.org> --- drivers/infiniband/hw/mthca/mthca_cmd.c | 10 +++------- drivers/infiniband/hw/mthca/mthca_cmd.h | 1 + drivers/infiniband/hw/mthca/mthca_dev.h | 2 +- 3 files changed, 5 insertions(+), 8 deletions(-) -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project