Blk_update_request: I/O errors

I am on Openwrt 18.06.1 running on an EA8500, which is also an ipq806x device. When I boot or run block info, I also get similar errors, such as below. This happens regardless of whether I have a USB drive plugged in or not. If I uninstall block-mount, these errors disappear from the log.

print_req_error: I/O error, dev mtdblock0, sector 0
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.517064] print_req_error: I/O error, dev mtdblock0, sector 8
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.522744] print_req_error: I/O error, dev mtdblock0, sector 16
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.528473] print_req_error: I/O error, dev mtdblock0, sector 24
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.534890] print_req_error: I/O error, dev mtdblock0, sector 0
Tue Aug 21 10:37:57 2018 kern.warn kernel: [  830.540038] buffer_io_error: 8 callbacks suppressed
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.540042] Buffer I/O error on dev mtdblock0, logical block 0, async page read
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.552617] print_req_error: I/O error, dev mtdblock0, sector 32
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.558394] print_req_error: I/O error, dev mtdblock0, sector 40
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.564641] print_req_error: I/O error, dev mtdblock0, sector 48
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.570550] print_req_error: I/O error, dev mtdblock0, sector 56
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.576638] print_req_error: I/O error, dev mtdblock0, sector 64
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.584046] Buffer I/O error on dev mtdblock0, logical block 1, async page read
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.590546] Buffer I/O error on dev mtdblock1, logical block 0, async page read
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.624789] Buffer I/O error on dev mtdblock1, logical block 1, async page read
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.920680] Buffer I/O error on dev mtdblock2, logical block 0, async page read
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.925736] Buffer I/O error on dev mtdblock2, logical block 1, async page read
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.929753] Buffer I/O error on dev mtdblock3, logical block 0, async page read
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.937309] Buffer I/O error on dev mtdblock3, logical block 0, async page read
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.945523] Buffer I/O error on dev mtdblock4, logical block 0, async page read
Tue Aug 21 10:37:57 2018 kern.err kernel: [  830.954858] Buffer I/O error on dev mtdblock4, logical block 0, async page read

Same@WNDR4300

blk_update_request: I/O error, dev mtdblock4, sector 16

Same here. I've just installed 18.06.1 on R7800, noticed these errors in the kernel log whenever I used block info command. I tried removing all usb3 drivers except usb2, and all usb2 except usb3 but errors still occurred.
I don't see this problem on WR1043ND or WRT3200ACM/32X.

same here..
r7800 on 18.06.1

I'm seeing the same with the EA8500

Do I understand it right that this error really does not matter?

Or did somebody find a solution yet?

@xchris
Explainend here

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