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| author |   David Herrmann <dh.herrmann@gmail.com> | 2014-08-29 12:12:41 +0200 |
|---|---|---|
| committer |   Dave Airlie <airlied@redhat.com> | 2014-09-10 17:42:14 +1000 |
| commit | d0a39164b6adad0cec5046b6aad6b590cc9466cc (patch) | |
| tree | 84ed1ba6ab36604fa2783f93a91229637e2c9b16 /drivers/gpu/drm/drm_pci.c | |
| parent | drm: move remaining includes in drmP.h to the top (diff) | |
| download | linux-dev-d0a39164b6adad0cec5046b6aad6b590cc9466cc.tar.xz linux-dev-d0a39164b6adad0cec5046b6aad6b590cc9466cc.zip | |
drm: simplify drm_*_set_unique()
Lets use kasprintf() to avoid pre-allocating the buffer. This is really
nothing to optimize for speed and the input is trusted, so kasprintf() is
just fine.
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_pci.c')
| -rw-r--r-- | drivers/gpu/drm/drm_pci.c | 30 |
1 files changed, 8 insertions, 22 deletions
diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c index 020cfd934854..8efea6b4602b 100644 --- a/drivers/gpu/drm/drm_pci.c +++ b/drivers/gpu/drm/drm_pci.c @@ -129,31 +129,17 @@ static int drm_get_pci_domain(struct drm_device *dev) static int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master) { - int len, ret; - master->unique_len = 40; - master->unique_size = master->unique_len; - master->unique = kmalloc(master->unique_size, GFP_KERNEL); - if (master->unique == NULL) + master->unique = kasprintf(GFP_KERNEL, "pci:%04x:%02x:%02x.%d", + drm_get_pci_domain(dev), + dev->pdev->bus->number, + PCI_SLOT(dev->pdev->devfn), + PCI_FUNC(dev->pdev->devfn)); + if (!master->unique) return -ENOMEM; - - len = snprintf(master->unique, master->unique_len, - "pci:%04x:%02x:%02x.%d", - drm_get_pci_domain(dev), - dev->pdev->bus->number, - PCI_SLOT(dev->pdev->devfn), - PCI_FUNC(dev->pdev->devfn)); - - if (len >= master->unique_len) { - DRM_ERROR("buffer overflow"); - ret = -EINVAL; - goto err; - } else - master->unique_len = len; - + master->unique_len = strlen(master->unique); + master->unique_size = master->unique_len + 1; return 0; -err: - return ret; } int drm_pci_set_unique(struct drm_device *dev, |