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authorZongjie Li <u202112089@hust.edu.cn>2023-05-09 14:27:26 +0300
committerHelge Deller <deller@gmx.de>2023-05-11 16:22:15 +0300
commit5a6bef734247c7a8c19511664ff77634ab86f45b (patch)
treea02d6414a949faa3cbebc9ac67713e45a7ea9c62 /drivers/video/fbdev/arcfb.c
parentac9a78681b921877518763ba0e89202254349d1b (diff)
downloadlinux-5a6bef734247c7a8c19511664ff77634ab86f45b.tar.xz
fbdev: arcfb: Fix error handling in arcfb_probe()
Smatch complains that: arcfb_probe() warn: 'irq' from request_irq() not released on lines: 587. Fix error handling in the arcfb_probe() function. If IO addresses are not provided or framebuffer registration fails, the code will jump to the err_addr or err_register_fb label to release resources. If IRQ request fails, previously allocated resources will be freed. Fixes: 1154ea7dcd8e ("[PATCH] Framebuffer driver for Arc LCD board") Signed-off-by: Zongjie Li <u202112089@hust.edu.cn> Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn> Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'drivers/video/fbdev/arcfb.c')
-rw-r--r--drivers/video/fbdev/arcfb.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/video/fbdev/arcfb.c b/drivers/video/fbdev/arcfb.c
index 45e64016db32..024d0ee4f04f 100644
--- a/drivers/video/fbdev/arcfb.c
+++ b/drivers/video/fbdev/arcfb.c
@@ -523,7 +523,7 @@ static int arcfb_probe(struct platform_device *dev)
info = framebuffer_alloc(sizeof(struct arcfb_par), &dev->dev);
if (!info)
- goto err;
+ goto err_fb_alloc;
info->screen_base = (char __iomem *)videomemory;
info->fbops = &arcfb_ops;
@@ -535,7 +535,7 @@ static int arcfb_probe(struct platform_device *dev)
if (!dio_addr || !cio_addr || !c2io_addr) {
printk(KERN_WARNING "no IO addresses supplied\n");
- goto err1;
+ goto err_addr;
}
par->dio_addr = dio_addr;
par->cio_addr = cio_addr;
@@ -551,12 +551,12 @@ static int arcfb_probe(struct platform_device *dev)
printk(KERN_INFO
"arcfb: Failed req IRQ %d\n", par->irq);
retval = -EBUSY;
- goto err1;
+ goto err_addr;
}
}
retval = register_framebuffer(info);
if (retval < 0)
- goto err1;
+ goto err_register_fb;
platform_set_drvdata(dev, info);
fb_info(info, "Arc frame buffer device, using %dK of video memory\n",
videomemorysize >> 10);
@@ -580,9 +580,12 @@ static int arcfb_probe(struct platform_device *dev)
}
return 0;
-err1:
+
+err_register_fb:
+ free_irq(par->irq, info);
+err_addr:
framebuffer_release(info);
-err:
+err_fb_alloc:
vfree(videomemory);
return retval;
}