unsigned long *idaws;
int ret;
int bytes = 1;
- int idaw_nr = 1;
+ int idaw_nr;
ccw = chain->ch_ccw + idx;
- if (ccw->count) {
+ if (ccw->count)
bytes = ccw->count;
- idaw_nr = idal_nr_words((void *)(u64)ccw->cda, ccw->count);
+
+ /* Calculate size of IDAL */
+ idaw_nr = idal_nr_words((void *)(u64)ccw->cda, bytes);
+
+ /* Allocate an IDAL from host storage */
+ idaws = kcalloc(idaw_nr, sizeof(*idaws), GFP_DMA | GFP_KERNEL);
+ if (!idaws) {
+ ret = -ENOMEM;
+ goto out_init;
}
/*
pa = chain->ch_pa + idx;
ret = pfn_array_alloc(pa, ccw->cda, bytes);
if (ret < 0)
- goto out_unpin;
+ goto out_free_idaws;
if (ccw_does_data_transfer(ccw)) {
ret = pfn_array_pin(pa, cp->mdev);
pa->pa_nr = 0;
}
- /* Translate this direct ccw to a idal ccw. */
- idaws = kcalloc(idaw_nr, sizeof(*idaws), GFP_DMA | GFP_KERNEL);
- if (!idaws) {
- ret = -ENOMEM;
- goto out_unpin;
- }
ccw->cda = (__u32) virt_to_phys(idaws);
ccw->flags |= CCW_FLAG_IDA;
+ /* Populate the IDAL with pinned/translated addresses from pfn */
pfn_array_idal_create_words(pa, idaws);
return 0;
out_unpin:
pfn_array_unpin_free(pa, cp->mdev);
+out_free_idaws:
+ kfree(idaws);
out_init:
ccw->cda = 0;
return ret;