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Message-ID: <9a0a0e7db8587a6f8fa8cb7f5e4835f73f4d7ad3.1401828520.git.himangi774@gmail.com>
Date: Wed, 4 Jun 2014 02:54:32 +0530
From: Himangi Saraogi <himangi774@...il.com>
To: Felipe Balbi <balbi@...com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: julia.lawall@...6.fr
Subject: [PATCH 2/2] usb: gadget: mv_u3d_core: use devm_ functions
The various devm_ functions allocate memory that is released when a
driver detaches. This patch uses devm_kzalloc, devm_request_irq,
devm_ioremap, dmam_pool_destroy, dmam_alloc_coherent,
dmam_pool_create etc. for data that is allocated in the probe function
of a platform device and is only freed in the remove function. The
corresponding free functions are removed and many labels are done away
with. Also, linux/device.h is added to make sure the devm_*()
routine declarations are unambiguously available.
Signed-off-by: Himangi Saraogi <himangi774@...il.com>
---
drivers/usb/gadget/mv_u3d_core.c | 128 +++++++++++----------------------------
1 file changed, 34 insertions(+), 94 deletions(-)
diff --git a/drivers/usb/gadget/mv_u3d_core.c b/drivers/usb/gadget/mv_u3d_core.c
index c6db4a8..5fb9cea 100644
--- a/drivers/usb/gadget/mv_u3d_core.c
+++ b/drivers/usb/gadget/mv_u3d_core.c
@@ -26,6 +26,7 @@
#include <linux/pm.h>
#include <linux/io.h>
#include <linux/irq.h>
+#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/platform_data/mv_usb.h>
#include <linux/clk.h>
@@ -1762,29 +1763,6 @@ static int mv_u3d_remove(struct platform_device *dev)
usb_del_gadget_udc(&u3d->gadget);
- /* free memory allocated in probe */
- if (u3d->trb_pool)
- dma_pool_destroy(u3d->trb_pool);
-
- if (u3d->ep_context)
- dma_free_coherent(&dev->dev, u3d->ep_context_size,
- u3d->ep_context, u3d->ep_context_dma);
-
- kfree(u3d->eps);
-
- if (u3d->irq)
- free_irq(u3d->irq, u3d);
-
- if (u3d->cap_regs)
- iounmap(u3d->cap_regs);
- u3d->cap_regs = NULL;
-
- kfree(u3d->status_req);
-
- clk_put(u3d->clk);
-
- kfree(u3d);
-
return 0;
}
@@ -1798,15 +1776,12 @@ static int mv_u3d_probe(struct platform_device *dev)
if (!dev_get_platdata(&dev->dev)) {
dev_err(&dev->dev, "missing platform_data\n");
- retval = -ENODEV;
- goto err_pdata;
+ return -ENODEV;
}
- u3d = kzalloc(sizeof(*u3d), GFP_KERNEL);
- if (!u3d) {
- retval = -ENOMEM;
- goto err_alloc_private;
- }
+ u3d = devm_kzalloc(&dev->dev, sizeof(*u3d), GFP_KERNEL);
+ if (!u3d)
+ return -ENOMEM;
spin_lock_init(&u3d->lock);
@@ -1815,25 +1790,21 @@ static int mv_u3d_probe(struct platform_device *dev)
u3d->dev = &dev->dev;
u3d->vbus = pdata->vbus;
- u3d->clk = clk_get(&dev->dev, NULL);
- if (IS_ERR(u3d->clk)) {
- retval = PTR_ERR(u3d->clk);
- goto err_get_clk;
- }
+ u3d->clk = devm_clk_get(&dev->dev, NULL);
+ if (IS_ERR(u3d->clk))
+ return PTR_ERR(u3d->clk);
r = platform_get_resource_byname(dev, IORESOURCE_MEM, "capregs");
if (!r) {
dev_err(&dev->dev, "no I/O memory resource defined\n");
- retval = -ENODEV;
- goto err_get_cap_regs;
+ return -ENODEV;
}
u3d->cap_regs = (struct mv_u3d_cap_regs __iomem *)
- ioremap(r->start, resource_size(r));
+ devm_ioremap(&dev->dev, r->start, resource_size(r));
if (!u3d->cap_regs) {
dev_err(&dev->dev, "failed to map I/O memory\n");
- retval = -EBUSY;
- goto err_map_cap_regs;
+ return -EBUSY;
} else {
dev_dbg(&dev->dev, "cap_regs address: 0x%lx/0x%lx\n",
(unsigned long) r->start,
@@ -1847,7 +1818,7 @@ static int mv_u3d_probe(struct platform_device *dev)
retval = pdata->phy_init(u3d->phy_regs);
if (retval) {
dev_err(&dev->dev, "init phy error %d\n", retval);
- goto err_u3d_enable;
+ return retval;
}
}
@@ -1873,40 +1844,35 @@ static int mv_u3d_probe(struct platform_device *dev)
size = u3d->max_eps * sizeof(struct mv_u3d_ep_context) * 2;
size = (size + MV_U3D_EP_CONTEXT_ALIGNMENT - 1)
& ~(MV_U3D_EP_CONTEXT_ALIGNMENT - 1);
- u3d->ep_context = dma_alloc_coherent(&dev->dev, size,
- &u3d->ep_context_dma, GFP_KERNEL);
+ u3d->ep_context = dmam_alloc_coherent(&dev->dev, size,
+ &u3d->ep_context_dma,
+ GFP_KERNEL);
if (!u3d->ep_context) {
dev_err(&dev->dev, "allocate ep context memory failed\n");
- retval = -ENOMEM;
- goto err_alloc_ep_context;
+ return -ENOMEM;
}
u3d->ep_context_size = size;
/* create TRB dma_pool resource */
- u3d->trb_pool = dma_pool_create("u3d_trb",
- &dev->dev,
- sizeof(struct mv_u3d_trb_hw),
- MV_U3D_TRB_ALIGNMENT,
- MV_U3D_DMA_BOUNDARY);
+ u3d->trb_pool = dmam_pool_create("u3d_trb", &dev->dev,
+ sizeof(struct mv_u3d_trb_hw),
+ MV_U3D_TRB_ALIGNMENT,
+ MV_U3D_DMA_BOUNDARY);
- if (!u3d->trb_pool) {
- retval = -ENOMEM;
- goto err_alloc_trb_pool;
- }
+ if (!u3d->trb_pool)
+ return -ENOMEM;
size = u3d->max_eps * sizeof(struct mv_u3d_ep) * 2;
- u3d->eps = kzalloc(size, GFP_KERNEL);
- if (!u3d->eps) {
- retval = -ENOMEM;
- goto err_alloc_eps;
- }
+ u3d->eps = devm_kzalloc(&dev->dev, size, GFP_KERNEL);
+ if (!u3d->eps)
+ return -ENOMEM;
/* initialize ep0 status request structure */
- u3d->status_req = kzalloc(sizeof(struct mv_u3d_req) + 8, GFP_KERNEL);
- if (!u3d->status_req) {
- retval = -ENOMEM;
- goto err_alloc_status_req;
- }
+ u3d->status_req = devm_kzalloc(&dev->dev,
+ sizeof(struct mv_u3d_req) + 8,
+ GFP_KERNEL);
+ if (!u3d->status_req)
+ return -ENOMEM;
INIT_LIST_HEAD(&u3d->status_req->queue);
/* allocate a small amount of memory to get valid address */
@@ -1922,17 +1888,15 @@ static int mv_u3d_probe(struct platform_device *dev)
r = platform_get_resource(dev, IORESOURCE_IRQ, 0);
if (!r) {
dev_err(&dev->dev, "no IRQ resource defined\n");
- retval = -ENODEV;
- goto err_get_irq;
+ return -ENODEV;
}
u3d->irq = r->start;
- if (request_irq(u3d->irq, mv_u3d_irq,
+ if (devm_request_irq(&dev->dev, u3d->irq, mv_u3d_irq,
IRQF_SHARED, driver_name, u3d)) {
u3d->irq = 0;
dev_err(&dev->dev, "Request irq %d for u3d failed\n",
u3d->irq);
- retval = -ENODEV;
- goto err_request_irq;
+ return -ENODEV;
}
/* initialize gadget structure */
@@ -1960,36 +1924,12 @@ static int mv_u3d_probe(struct platform_device *dev)
retval = usb_add_gadget_udc(&dev->dev, &u3d->gadget);
if (retval)
- goto err_unregister;
+ return retval;
dev_dbg(&dev->dev, "successful probe usb3 device %s clock gating.\n",
u3d->clock_gating ? "with" : "without");
return 0;
-
-err_unregister:
- free_irq(u3d->irq, u3d);
-err_request_irq:
-err_get_irq:
- kfree(u3d->status_req);
-err_alloc_status_req:
- kfree(u3d->eps);
-err_alloc_eps:
- dma_pool_destroy(u3d->trb_pool);
-err_alloc_trb_pool:
- dma_free_coherent(&dev->dev, u3d->ep_context_size,
- u3d->ep_context, u3d->ep_context_dma);
-err_alloc_ep_context:
-err_u3d_enable:
- iounmap(u3d->cap_regs);
-err_map_cap_regs:
-err_get_cap_regs:
-err_get_clk:
- clk_put(u3d->clk);
- kfree(u3d);
-err_alloc_private:
-err_pdata:
- return retval;
}
#ifdef CONFIG_PM_SLEEP
--
1.9.1
--
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