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drm/mgag200: Don't read-back PCI option register before writing
Remove the read operation from mgag200_init_pci_options(). It was
incorrectly added while refactoring the code. Reading the PCI option
register clears the register's new value and subsequently leads to
re-writing the old value.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Fixes: ce19021fd9
("drm/mgag200: Move PCI-option setup into model-specific code")
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Jocelyn Falempe <jfalempe@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Link: https://patchwork.freedesktop.org/patch/msgid/20220708072114.13960-1-tzimmermann@suse.de
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1 changed files with 0 additions and 6 deletions
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@ -28,12 +28,6 @@ int mgag200_init_pci_options(struct pci_dev *pdev, u32 option, u32 option2)
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struct device *dev = &pdev->dev;
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int err;
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err = pci_read_config_dword(pdev, PCI_MGA_OPTION, &option);
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if (err != PCIBIOS_SUCCESSFUL) {
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dev_err(dev, "pci_read_config_dword(PCI_MGA_OPTION) failed: %d\n", err);
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return pcibios_err_to_errno(err);
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}
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err = pci_write_config_dword(pdev, PCI_MGA_OPTION, option);
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if (err != PCIBIOS_SUCCESSFUL) {
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dev_err(dev, "pci_write_config_dword(PCI_MGA_OPTION) failed: %d\n", err);
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