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RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,suse.de:mid,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,pm.me:email] X-Rspamd-Action: no action X-Spam-Flag: NO X-Spam-Score: -4.51 X-Spam-Level: X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Queue-Id: 4F8F44D1FD Hi Am 10.03.26 um 12:38 schrieb Hardik Phalet: > The driver calls ioremap() on the HGA video memory at 0xb0000 without > first reserving the physical address range. This leaves the kernel > resource tree incomplete and can cause silent conflicts with other > drivers claiming the same range. > > Add a devm_request_mem_region() call before ioremap() in > hga_card_detect() to reserve the memory region. > > Signed-off-by: Hardik Phalet > --- > Changes in v2: > - Used devm_request_mem_region instead of request_mem_region, based on a > review comment by Thomas [1]. > > v1: https://lore.kernel.org/all/20260310064124.602848-1-hardik.phalet@pm.me/ > [1]: https://lore.kernel.org/all/5f9749ba-18a8-4b6b-a6e7-a011a3871bfb@suse.de/ > > drivers/video/fbdev/hgafb.c | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/drivers/video/fbdev/hgafb.c b/drivers/video/fbdev/hgafb.c > index 14418aa3791a..fffd34141f8d 100644 > --- a/drivers/video/fbdev/hgafb.c > +++ b/drivers/video/fbdev/hgafb.c > @@ -276,7 +276,7 @@ static void hga_blank(int blank_mode) > spin_unlock_irqrestore(&hga_reg_lock, flags); > } > > -static int hga_card_detect(void) > +static int hga_card_detect(struct platform_device *pdev) > { > int count = 0; > void __iomem *p, *q; > @@ -284,6 +284,11 @@ static int hga_card_detect(void) > > hga_vram_len = 0x08000; > > + if (!devm_request_mem_region(&pdev->dev, 0xb0000, hga_vram_len, "hgafb")) { > + pr_err("hgafb: cannot reserve video memory at 0xb0000\n"); dev_err() with pdev->dev please. The rest looks good. Best regards Thomas > + return -EBUSY; > + } > + > hga_vram = ioremap(0xb0000, hga_vram_len); > if (!hga_vram) > return -ENOMEM; > @@ -568,7 +573,7 @@ static int hgafb_probe(struct platform_device *pdev) > struct fb_info *info; > int ret; > > - ret = hga_card_detect(); > + ret = hga_card_detect(pdev); > if (ret) > return ret; > -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)