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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

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Pull s390 fixes from Martin Schwidefsky:
 "Four bug fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/dasd: fix wrongly assigned configuration data
  s390: fix preemption race in disable_sacf_uaccess
  s390/sclp: disable FORTIFY_SOURCE for early sclp code
  s390/pci: handle insufficient resources during dma tlb flush
This commit is contained in:
Linus Torvalds 2018-01-05 12:17:33 -08:00
commit 3eac690383
5 changed files with 35 additions and 3 deletions
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2
arch/s390/lib/uaccess.c
View File

@ -89,11 +89,11 @@ EXPORT_SYMBOL(enable_sacf_uaccess);
void disable_sacf_uaccess(mm_segment_t old_fs)
{
current->thread.mm_segment = old_fs;
if (old_fs == USER_DS && test_facility(27)) {
__ctl_load(S390_lowcore.user_asce, 1, 1);
clear_cpu_flag(CIF_ASCE_PRIMARY);
}
current->thread.mm_segment = old_fs;
}
EXPORT_SYMBOL(disable_sacf_uaccess);

21
arch/s390/pci/pci_dma.c
View File

@ -181,6 +181,9 @@ out_unlock:
static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr,
size_t size, int flags)
{
unsigned long irqflags;
int ret;
/*
* With zdev->tlb_refresh == 0, rpcit is not required to establish new
* translations when previously invalid translation-table entries are
@ -196,8 +199,22 @@ static int __dma_purge_tlb(struct zpci_dev *zdev, dma_addr_t dma_addr,
return 0;
}
return zpci_refresh_trans((u64) zdev->fh << 32, dma_addr,
PAGE_ALIGN(size));
ret = zpci_refresh_trans((u64) zdev->fh << 32, dma_addr,
PAGE_ALIGN(size));
if (ret == -ENOMEM && !s390_iommu_strict) {
/* enable the hypervisor to free some resources */
if (zpci_refresh_global(zdev))
goto out;
spin_lock_irqsave(&zdev->iommu_bitmap_lock, irqflags);
bitmap_andnot(zdev->iommu_bitmap, zdev->iommu_bitmap,
zdev->lazy_bitmap, zdev->iommu_pages);
bitmap_zero(zdev->lazy_bitmap, zdev->iommu_pages);
spin_unlock_irqrestore(&zdev->iommu_bitmap_lock, irqflags);
ret = 0;
}
out:
return ret;
}
static int dma_update_trans(struct zpci_dev *zdev, unsigned long pa,

3
arch/s390/pci/pci_insn.c
View File

@ -89,6 +89,9 @@ int zpci_refresh_trans(u64 fn, u64 addr, u64 range)
if (cc)
zpci_err_insn(cc, status, addr, range);
if (cc == 1 && (status == 4 || status == 16))
return -ENOMEM;
return (cc) ? -EIO : 0;
}

10
drivers/s390/block/dasd_3990_erp.c
View File

@ -2803,6 +2803,16 @@ dasd_3990_erp_action(struct dasd_ccw_req * cqr)
erp = dasd_3990_erp_handle_match_erp(cqr, erp);
}
/*
* For path verification work we need to stick with the path that was
* originally chosen so that the per path configuration data is
* assigned correctly.
*/
if (test_bit(DASD_CQR_VERIFY_PATH, &erp->flags) && cqr->lpm) {
erp->lpm = cqr->lpm;
}
if (device->features & DASD_FEATURE_ERPLOG) {
/* print current erp_chain */
dev_err(&device->cdev->dev,

2
drivers/s390/char/Makefile
View File

@ -17,6 +17,8 @@ CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH)
CFLAGS_sclp_early_core.o += -march=z900
endif
CFLAGS_sclp_early_core.o += -D__NO_FORTIFY
obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
sclp_cmd.o sclp_config.o sclp_cpi_sys.o sclp_ocf.o sclp_ctl.o \
sclp_early.o sclp_early_core.o