forked from luck/tmp_suning_uos_patched
rtc: release correct region in error path
The misc_register() error path always released an I/O port region, even if the region was memory-mapped (only mips uses memory-mapped RTC, as far as I can see). Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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c06a018fa5
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4c06be10c7
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@ -918,6 +918,14 @@ static const struct file_operations rtc_proc_fops = {
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};
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#endif
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static void rtc_release_region(void)
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{
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if (RTC_IOMAPPED)
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release_region(RTC_PORT(0), RTC_IO_EXTENT);
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else
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release_mem_region(RTC_PORT(0), RTC_IO_EXTENT);
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}
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static int __init rtc_init(void)
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{
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#ifdef CONFIG_PROC_FS
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@ -992,10 +1000,7 @@ static int __init rtc_init(void)
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/* Yeah right, seeing as irq 8 doesn't even hit the bus. */
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rtc_has_irq = 0;
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printk(KERN_ERR "rtc: IRQ %d is not free.\n", RTC_IRQ);
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if (RTC_IOMAPPED)
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release_region(RTC_PORT(0), RTC_IO_EXTENT);
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else
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release_mem_region(RTC_PORT(0), RTC_IO_EXTENT);
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rtc_release_region();
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return -EIO;
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}
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hpet_rtc_timer_init();
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@ -1009,7 +1014,7 @@ static int __init rtc_init(void)
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free_irq(RTC_IRQ, NULL);
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rtc_has_irq = 0;
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#endif
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release_region(RTC_PORT(0), RTC_IO_EXTENT);
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rtc_release_region();
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return -ENODEV;
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}
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@ -1091,10 +1096,7 @@ static void __exit rtc_exit (void)
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if (rtc_has_irq)
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free_irq (rtc_irq, &rtc_port);
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#else
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if (RTC_IOMAPPED)
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release_region(RTC_PORT(0), RTC_IO_EXTENT);
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else
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release_mem_region(RTC_PORT(0), RTC_IO_EXTENT);
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rtc_release_region();
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#ifdef RTC_IRQ
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if (rtc_has_irq)
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free_irq (RTC_IRQ, NULL);
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