On 3 Feb 2015, Myron Stowe told this: > There seem to be a number of issues with CS553x devices and due to a > recent patch series that detects PCI read-only BARs [1], we've encountered > more. > > It appears that not only are the BAR values associated with this device > often greater than the largest range that an IO decoder can request, they > can also be non-conformant with respect to PCI's BAR sizing aspects, > behaving instead, in a read-only manner [2]. > > This patch addresses read-only BAR values corresponding to CS553x devices > by expanding the existing quirk, manually inserting regions based on the > device's BIOS settings (as opposed to basing such on normal BAR sizing > actions) when necessary. Looks good! [ 0.270107] PCI: Probing PCI hardware [ 0.280187] PCI host bridge to bus 0000:00 [ 0.290028] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] [ 0.300021] pci_bus 0000:00: root bus resource [mem 0x00000000-0xffffffff] [ 0.310018] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] [ 0.325514] pci 0000:00:14.0: [Firmware Bug]: CS5536 ISA bridge quirk: reg 0x10: [io 0x6000-0x6007] [ 0.330042] pci 0000:00:14.0: [Firmware Bug]: CS5536 ISA bridge quirk: reg 0x14: [io 0x6100-0x61ff] [ 0.340039] pci 0000:00:14.0: [Firmware Bug]: CS5536 ISA bridge quirk: reg 0x18: [io 0x6200-0x63ff] [ 0.350017] pci 0000:00:14.0: CS5536 ISA bridge bug detected (incorrect header); workaround applied [ 0.361456] pci 0000:00:14.2: legacy IDE quirk: reg 0x10: [io 0x01f0-0x01f7] [ 0.370019] pci 0000:00:14.2: legacy IDE quirk: reg 0x14: [io 0x03f6] [ 0.380019] pci 0000:00:14.2: legacy IDE quirk: reg 0x18: [io 0x0170-0x0177] [ 0.390017] pci 0000:00:14.2: legacy IDE quirk: reg 0x1c: [io 0x0376] [ 0.405842] pci 0000:00:0e.0: PCI bridge to [bus 01] [ 0.412043] Switched to clocksource pit [...] [ 0.780013] cs5535-gpio cs5535-gpio: reserved resource region [io 0x6100-0x61ff] [ 0.785102] cs5535-mfgpt cs5535-mfgpt: reserved resource region [io 0x6200-0x63ff] [ 0.801002] cs5535-mfgpt cs5535-mfgpt: 8 MFGPT timers available [ 0.806684] cs5535-mfd 0000:00:14.0: 5 devices registered. [...] [ 1.451754] cs5535-smb cs5535-smb: SCx200 device 'CS5535 ACB0' registered [ 1.452515] pc87360: Device 0x09 not activated [ 1.470755] cs5535-mfgpt cs5535-mfgpt: registered timer 0 [ 1.473869] Geode LX AES 0000:00:01.2: GEODE AES engine enabled. [ 1.489999] cs5535-mfgpt cs5535-mfgpt: registered timer 1 [ 1.492402] cs5535-clockevt: Registering MFGPT timer as a clock event, using IRQ 7 [...] [ 1.621402] Switched to clocksource tsc nix@fold 3 /home/nix% grep cs5535 /proc/timer_list Clock Event Device: cs5535-clockevt nix@fold 4 /home/nix% ls -l /dev/watchdog crw------- 1 root root 10, 130 Feb 4 00:14 /dev/watchdog Thank you for such a prompt fix on hardware as obscure as this :) -- NULL && (void) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
