[ppc64] llan: fix fatal kernel trap when system is low on memory
When running several builders in parallel, on QEMU, with 8GB of memory, a fatal kernel trap (0x300 (data storage interrupt)) caused by llan driver is sometimes observed, when the system starts to run out of swap space. This happens because, at llan_intr(), a phyp call to add a logical LAN buffer is always made when llan_add_rxbuf() fails, even if it fails to allocate a new buffer. PR: 235489 Reviewed by: jhibbits Differential Revision: https://reviews.freebsd.org/D19084
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=343791
@ -386,8 +386,6 @@ llan_intr(void *xsc)
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/* llan_add_rxbuf does DMA sync and unload as well as requeue */
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if (llan_add_rxbuf(sc, rx) != 0) {
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if_inc_counter(sc->ifp, IFCOUNTER_IERRORS, 1);
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phyp_hcall(H_ADD_LOGICAL_LAN_BUFFER, sc->unit,
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rx->rx_bufdesc);
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continue;
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}
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