target/linux/brcm47xx/patches-4.14/610-pci_ide_fix.patch

   1 From: b.sander
   2 Subject: [PATCH] pci: IDE fix
   3
   4 These are standard probing messages when using pdc202xx_old:
   5 pdc202xx_old 0000:00:01.0: IDE controller (0x105a:0x0d30 rev 0x02)
   6 PCI: Enabling device 0000:00:01.0 (0004 -> 0007)
   7 PCI: Fixing up device 0000:00:01.0
   8 0000:00:01.0: (U)DMA Burst Bit DISABLED Primary PCI Mode Secondary PCI Mode.
   9 0000:00:01.0: FORCING BURST BIT 0x00->0x01 ACTIVE
  10 pdc202xx_old 0000:00:01.0: 100% native mode on irq 6
  11
  12 With the default MAX_HWIFS value after above we get:
  13     ide2: BM-DMA at 0x0400-0x0407
  14     ide3: BM-DMA at 0x0408-0x040f
  15 Probing IDE interface ide2...
  16 hde: CF500, CFA DISK drive
  17
  18 As you can see it's ide2 + ide3 and hde.
  19
  20 With this patch applied we get:
  21     ide0: BM-DMA at 0x0400-0x0407
  22     ide1: BM-DMA at 0x0408-0x040f
  23 Probing IDE interface ide0...
  24 hda: CF500, CFA DISK drive
  25
  26 This fixes OpenWrt ticket #7061: https://dev.openwrt.org/ticket/7061
  27 ---
  28 --- a/include/linux/ide.h
  29 +++ b/include/linux/ide.h
  30 @@ -241,7 +241,11 @@ static inline void ide_std_init_ports(st
  31         hw->io_ports.ctl_addr = ctl_addr;
  32  }
  33
  34 +#if defined CONFIG_BCM47XX
  35 +# define MAX_HWIFS     2
  36 +#else
  37  #define MAX_HWIFS      10
  38 +#endif
  39
  40  /*
  41   * Now for the data we need to maintain per-drive:  ide_drive_t