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hw/usb-ohci.c: Ignore writes to HcPeriodCurrentED register

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HcPeriodCurrentED is read-only, but Linux writes to it anyway; silently
ignore this rather than printing a warning message.

(Specifically, drivers/usb/host/ohci-hub.c:ohci_rh_resume() writes a
0, in at least kernels 2.6.25 through 2.6.39.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Peter Maydell 2011-06-07 20:02:29 +01:00 committed by Gerd Hoffmann
parent 4001f22ffd
commit 4b0315d7ed
1 changed files with 4 additions and 0 deletions
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4
hw/usb-ohci.c
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@ -1575,6 +1575,10 @@ static void ohci_mem_write(void *ptr, target_phys_addr_t addr, uint32_t val)
ohci->hcca = val & OHCI_HCCA_MASK; ohci->hcca = val & OHCI_HCCA_MASK;
break; break;
case 7: /* HcPeriodCurrentED */
/* Ignore writes to this read-only register, Linux does them */
break;
case 8: /* HcControlHeadED */ case 8: /* HcControlHeadED */
ohci->ctrl_head = val & OHCI_EDPTR_MASK; ohci->ctrl_head = val & OHCI_EDPTR_MASK;
break; break;