From: Binoy Jayan <binoy.jayan@linaro.org>
To: Doug Ledford <dledford@redhat.com>,
Sean Hefty <sean.hefty@intel.com>,
Hal Rosenstock <hal.rosenstock@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
Binoy Jayan <binoy.jayan@linaro.org>
Subject: [PATCH v3 4/9] IB/mthca: Replace semaphore poll_sem with mutex
Date: Wed, 26 Oct 2016 13:31:09 +0530 [thread overview]
Message-ID: <1477468874-16328-5-git-send-email-binoy.jayan@linaro.org> (raw)
In-Reply-To: <1477468874-16328-1-git-send-email-binoy.jayan@linaro.org>
The semaphore 'poll_sem' is a simple mutex, so it should be written as one.
Semaphores are going away in the future. So replace the semaphore 'poll_sem'
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(-)
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index c7f49bb..49c6e19 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -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,
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.h b/drivers/infiniband/hw/mthca/mthca_cmd.h
index d2e5b19..a7f197e 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.h
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.h
@@ -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
diff --git a/drivers/infiniband/hw/mthca/mthca_dev.h b/drivers/infiniband/hw/mthca/mthca_dev.h
index 4393a02..87ab964 100644
--- a/drivers/infiniband/hw/mthca/mthca_dev.h
+++ b/drivers/infiniband/hw/mthca/mthca_dev.h
@@ -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 Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2016-10-26 8:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-26 8:01 [PATCH v3 0/9] infiniband: Remove semaphores Binoy Jayan
[not found] ` <1477468874-16328-1-git-send-email-binoy.jayan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-10-26 8:01 ` [PATCH v3 1/9] IB/core: iwpm_nlmsg_request: Replace semaphore with completion Binoy Jayan
2016-10-26 8:01 ` [PATCH v3 5/9] IB/isert: Replace semaphore sem " Binoy Jayan
2016-10-26 8:01 ` [PATCH v3 8/9] IB/mlx5: Add helper mlx5_ib_post_send_wait Binoy Jayan
[not found] ` <1477468874-16328-9-git-send-email-binoy.jayan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2016-10-26 8:48 ` Arnd Bergmann
2016-10-27 6:09 ` Leon Romanovsky
2016-10-26 8:01 ` [PATCH v3 9/9] IB/mlx5: Simplify completion into a wait_event Binoy Jayan
2016-10-26 8:01 ` [PATCH v3 2/9] IB/core: Replace semaphore sm_sem with an atomic wait Binoy Jayan
2016-10-26 8:01 ` [PATCH v3 3/9] IB/hns: Replace semaphore poll_sem with mutex Binoy Jayan
2016-10-26 8:01 ` Binoy Jayan [this message]
2016-10-26 8:01 ` [PATCH v3 6/9] IB/hns: Replace counting semaphore event_sem with wait_event Binoy Jayan
2016-10-26 8:01 ` [PATCH v3 7/9] IB/mthca: " Binoy Jayan
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