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| author | Chuhong Yuan <hslester96@gmail.com> | 2020-03-29 22:58:39 +0800 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2020-04-17 15:50:14 +0200 |
| commit | 693774995595b40ae74264216f933224021f4577 (patch) | |
| tree | b54479fb356c7116a603f1da742faa8491e5373a /drivers/video | |
| parent | fbe3d80df87bb3f91fe1d8b421b69c3c8d089640 (diff) | |
| download | linux-693774995595b40ae74264216f933224021f4577.tar.bz2 | |
video: fbdev: vesafb: add missed release_region
The driver forgets to free the I/O region in remove and probe
failure.
Add the missed calls to fix it.
Since the success of request_region() is optional, add the "region" field
in vesafb_par to represent whether request_region() succeeds.
Then only call release_region() when "region" is not null.
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200329145839.20076-1-hslester96@gmail.com
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/fbdev/vesafb.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/video/fbdev/vesafb.c b/drivers/video/fbdev/vesafb.c index a1fe24ea869b..df6de5a9dd4c 100644 --- a/drivers/video/fbdev/vesafb.c +++ b/drivers/video/fbdev/vesafb.c @@ -32,6 +32,7 @@ struct vesafb_par { u32 pseudo_palette[256]; int wc_cookie; + struct resource *region; }; static struct fb_var_screeninfo vesafb_defined = { @@ -411,7 +412,7 @@ static int vesafb_probe(struct platform_device *dev) /* request failure does not faze us, as vgacon probably has this * region already (FIXME) */ - request_region(0x3c0, 32, "vesafb"); + par->region = request_region(0x3c0, 32, "vesafb"); if (mtrr == 3) { unsigned int temp_size = size_total; @@ -439,7 +440,7 @@ static int vesafb_probe(struct platform_device *dev) "vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n", vesafb_fix.smem_len, vesafb_fix.smem_start); err = -EIO; - goto err; + goto err_release_region; } printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, " @@ -458,19 +459,22 @@ static int vesafb_probe(struct platform_device *dev) if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) { err = -ENOMEM; - goto err; + goto err_release_region; } if (register_framebuffer(info)<0) { err = -EINVAL; fb_dealloc_cmap(&info->cmap); - goto err; + goto err_release_region; } fb_info(info, "%s frame buffer device\n", info->fix.id); return 0; -err: +err_release_region: arch_phys_wc_del(par->wc_cookie); if (info->screen_base) iounmap(info->screen_base); + if (par->region) + release_region(0x3c0, 32); +err: framebuffer_release(info); release_mem_region(vesafb_fix.smem_start, size_total); return err; @@ -481,6 +485,8 @@ static int vesafb_remove(struct platform_device *pdev) struct fb_info *info = platform_get_drvdata(pdev); unregister_framebuffer(info); + if (((struct vesafb_par *)(info->par))->region) + release_region(0x3c0, 32); framebuffer_release(info); return 0; |